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From triangle chapter theorem 2

Posted by Srushti Kambi 4 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Anurag Shekhar 4 years, 10 months ago

We are given an isosceles triangle ABC in which AB = AC. We need to prove that ∠ B = ∠ C. Let us draw the bisector of ∠ A and let D be the point of intersection of this bisector of ∠ A and BC (see Fig. 7.25). In Δ BAD and Δ CAD, AB = AC (Given) ∠ BAD = ∠ CAD (By construction) AD = AD (Common) So, Δ BAD ≅ Δ CAD (By SAS rule) So, ∠ ABD = ∠ ACD, since they are corresponding angles of congruent triangles. So, ∠ B = ∠ C ?

ANSWER

Write the factors of ihe polynomial 4x²+y²+4+4xy+8x+4y

Posted by Kalika Hande 4 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Poonam Nandiwale 4 years, 10 months ago

4x² + y² + 4xy + 8x + 4y = 4² + 4xy + y² + 8x + 4y + 4 =[(2x)² + 2 × (2x) (y) + (y)²] + 4 (2x + y ) + 4 = a² + 4a + 4 =a² + 2a + 2a + 4 = a (a+2) + 2 (a + 2 ) =(a + 2) (a + 2 ) = (a + 2)² = ( 2x + y + 2 )² Thus, 4x² + y² + 4xy + 8x + 4y + 4 = ( 2x + y + 2 )²

ANSWER

8.0025 in the form of p/q form

Posted by Ankit Kumar 4 years, 10 months ago

CBSE > Class 09 > Mathematics

4 answers

Harshit Chandra 4 years, 10 months ago

8.0025 ko jb hum पॉइंट हटाएं ge तो 80025 by 10000 तो उसके बद denominator and namunator me 25 se divede karange to answer hoga 3201/400

Malladi Sriram 4 years, 10 months ago

3201/400

Annu Sharma 4 years, 10 months ago

80025÷10000 = 3201÷400

Sanvi Sharma 4 years, 10 months ago

80025/10000 = 3201/400

ANSWER

3+3×3+3

Posted by Shweta Rana 4 years, 11 months ago

CBSE > Class 09 > Mathematics

5 answers

Annu Sharma 4 years, 10 months ago

?? ?????? ???? =15 ??????? ?????? ???? ?????? ?? 21

Mahak Jat 4 years, 10 months ago

21

Prajakta Karmude 4 years, 10 months ago

By BODMAS rule 9+3+3=15

Shivani Yadav 4 years, 11 months ago

Area of triangle

Divya Upadhyay 4 years, 11 months ago

3+3×3+3 6×6 = 36

ANSWER

Construction a∆ABC in which in base BC=3cm and AB+AC=52cm also justify

Posted by Sandhya Sandhya 4 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Samidha Mishra 4 years, 11 months ago

Angle subscribe by a chard at a point

ANSWER

Show that if the diagonal of qudrilatral are equal and bisect each other at right angles, then it is a square

Posted by Yash Verma 4 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Write zeros of the polynomial p(x) = x(x-2) (x-3)

Posted by Shreyash Sable 4 years, 11 months ago

CBSE > Class 09 > Mathematics

2 answers

Aryan Sharma 4 years, 10 months ago

0,-2,3

Shiva 7 4 years, 11 months ago

P (x)=x (x-2) (x-3) P (0)=0 (0-2) (0-3) =0 (2) (3) Anw=0

ANSWER

Total surface area of a right circular cone is ??

Posted by Raj Nandni 4 years, 11 months ago

CBSE > Class 09 > Mathematics

4 answers

Smarty Jain 4 years, 10 months ago

πr(l+r)

Annu Sharma 4 years, 10 months ago

π? (?+?)

Prajakta Karmude 4 years, 10 months ago

TSA of right circular cone =πrl+πr²

Sunita Wadhwa 4 years, 11 months ago

Pie r (l+r)

ANSWER

Formula of surface area of cone

Posted by Sameer Lugun 4 years, 11 months ago

CBSE > Class 09 > Mathematics

5 answers

Divya Upadhyay 4 years, 11 months ago

22\7 × r × l

Riya Sharma💜🤞 4 years, 11 months ago

πrl is the formula of surface area of cone.

Raj Nandni 4 years, 11 months ago

Pie r l

Diksha Prajapati 4 years, 11 months ago

πrl

Payal Banjare 4 years, 11 months ago

Curved surface area of cone = πrl Total surface area of cone = πr(l+r)

ANSWER

Find the area of isosceles triangle whose equal side is 6 cm, 6 cm and 8 cm

Posted by Ajit Singh 4 years, 11 months ago

CBSE > Class 09 > Mathematics

4 answers

Smarty Jain 4 years, 10 months ago

17.88854382 cm³

Arhaan Mallik 4 years, 10 months ago

Your answer is 8 root 5

Annu Sharma 4 years, 10 months ago

4√2

Sunita Wadhwa 4 years, 11 months ago

8 root 5 is correct answer

ANSWER

Every rational number is whole number is true or false

Posted by Komal Deep Kaur Bhandohal 4 years, 11 months ago

CBSE > Class 09 > Mathematics

5 answers

Kumari Kriti 4 years, 11 months ago

False

Bimla Gupta 4 years, 11 months ago

Yed

Anmol Preet 4 years, 11 months ago

False

Suzan Bihari 4 years, 11 months ago

Flase

Komal Deep Kaur Bhandohal 4 years, 11 months ago

False

ANSWER

What length of tarpaulin 3m wide will be required to make the conical tent of height 8 m and base radius 6m. Assume that the extra length will be required for stitching margin and wastage in cutting is 20 cm.

Posted by Sampritha Joy 4 years, 11 months ago

CBSE > Class 09 > Mathematics

2 answers

Prajwal Pawar 4 years, 10 months ago

63

Kumari Kriti 4 years, 11 months ago

Ans. 63m

ANSWER

3√2*4³/²÷128⅓

Posted by Samyukth Oswal 4 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Find the total surface area of a cone whose radius is r/2 and slant height 21

Posted by Tabrez Khan 4 years, 11 months ago

CBSE > Class 09 > Mathematics

2 answers

Vishal Morya 4 years, 11 months ago

Given, radius =2r and slant height =2l Therefore new total surface area of cone =π2r(2r+2l) =π(4r2+rl) =πr(l+4r)

Tabrez Khan 4 years, 11 months ago

Please give me answer

ANSWER

Simplify (3√5 - √2) (3√5 - √2

Posted by Aditya Kumawat 4 years, 11 months ago

CBSE > Class 09 > Mathematics

4 answers

Arhaan Mallik 4 years, 10 months ago

47–6 root 10

Vishal Morya 4 years, 11 months ago

(3√5-√2)(3√5-√2) (3√5-√2)² (3√5)²+(√2)²-2*3√5*√2 45+2-6√10 47+6√10

Lokesh Bhakal Janana 4 years, 11 months ago

योगेश से

Lokesh Bhakal Janana 4 years, 11 months ago

Yorm

ANSWER

3(2^x+1)-(2^x+2)+5=0

Posted by Khushboo Jha 4 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

What type of decimal expansion that the rational number 2/5 has??

Posted by Padmapriya P.V 4 years, 11 months ago

CBSE > Class 09 > Mathematics

4 answers

Arhaan Mallik 4 years, 10 months ago

0.4 terminating decimal

Saatvik Kaushal 4 years, 11 months ago

0.4

Ayush Tiwari 4 years, 11 months ago

0.4

Manish Raghav 4 years, 11 months ago

0.20

ANSWER

Two supplementary angles differ by 30°. Find the angles.

Posted by Arham Singhai 4 years, 11 months ago

CBSE > Class 09 > Mathematics

3 answers

Arhaan Mallik 4 years, 10 months ago

105 degree and 75 degree

Lokesh Bhakal Janana 4 years, 11 months ago

योगी योगेश से

Ayush Tiwari 4 years, 11 months ago

150°

ANSWER

P(E)=0.07. find (E)

Posted by Aman Yadav 4 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Ayush Tiwari 4 years, 11 months ago

E is the event occurred

ANSWER

if i were u

Posted by Poorna Chandra 4 years, 11 months ago

CBSE > Class 09 > Mathematics

4 answers

Atul Kumar 4 years, 11 months ago

Gerrard

Riya Sharma💜🤞 4 years, 11 months ago

English Language and Literature Revision Notes Beehive Chapter 11 If I Were You A man named Gerrard lives alone in a small cottage. He is engaged in packing his travelling bag when silently an intruder enters with a revolver in his hand. The intruder asks him some questions to which Gerrard replies in a roundabout way. The intruder threatens to kill him. The intruder says that he has killed a policeman and already he is a wanted person. The intruder thought that he was similar to Gerrard. He would kill Gerrard and then pretend to be Vincent Charles Gerrard to escape from the police. Gerrard acted cleverly and tells the intruder that he himself is a murderer. One of his men have been caught. The police is after him. He had packed his bag to escape. Intruder wont be safe after taking his identity. He asks the intruder to accompany him. Gerrard opens a door as if to the garage. As the intruder leans forward, Gerrard pushes him into the cupboard, knocked the revolver out of his hand, slammed the door, locked it, picked up the revolver and called the police.

Ayush Pandey 4 years, 11 months ago

Gerrard

Sunita Meena 4 years, 11 months ago

Intruder

ANSWER

If the sides of a triangle are produced in order, prove that the sum of exterior angles is equal to 360 degree

Posted by Mohammad Arham 4 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

My exam is started i want imp questions for exam

Posted by Riyan Khan 4 years, 11 months ago

CBSE > Class 09 > Mathematics

4 answers

Divya Upadhyay 4 years, 11 months ago

In maths most of the questions will asked by Geometry and in science (bio), Diagrams are play a Major role in bio... in (chemistry), numericals of structure of an atom are very important and in (Physics), numericals are very very important and some basic topics of all chapters you will also revise. And please don't compromise sleep.. keep motivated and don't forget to take some rest after the study "Fact" if you all do 10 or 20 mins mediation forget about everything just focus on you breath before exam. You will be calm in your class and also will help you to memorise..?

Atul Kumar 4 years, 11 months ago

Subject

Puneet Kour 4 years, 11 months ago

Kaun sa subject

Riyan Khan 4 years, 11 months ago

Please give me

ANSWER

Kis kis Ka maths Ka exam ho Gaya class 9 ka

Posted by Akanksha Kumari 4 years, 11 months ago

CBSE > Class 09 > Mathematics

5 answers

Shubham Sharma 4 years, 11 months ago

Ho gya

Preeti Singh 4 years, 11 months ago

Mera first paper maths hi ka tha 2 march

Preeti Singh 4 years, 11 months ago

Ho gaya

Akanksha Kumari 4 years, 11 months ago

kab hai

Sushant Raut 4 years, 11 months ago

Nahi

ANSWER

Find the area of a triangle two sides of which are 18cm and 10cm and the perimeter is 42 cm

Posted by Zayn Malik 4 years, 11 months ago

CBSE > Class 09 > Mathematics

5 answers

Arhaan Mallik 4 years, 10 months ago

S=42/2=21

Commando 4 years, 11 months ago

40/2

Anshu Agrawal 4 years, 11 months ago

let, side a=18 cm, side b=10cm, and c =x and the perimeter is 42 cm now , to find the c , 18+10+x=42 28+x=42 x=42-28 x=14cm. so, c=14cm S=a+b+c/2 S=18+10+12/2 S=20cm Area of triangle by herons formula=√ S(S-a)(S-b)(S-c) =√ 20(20-18)(20-10)(20-12) =√20 X 2 X 10 X 8 =√5 X 4 X 2 X 5 X 2 X 4 X 2 =5 X 4 X 2 √ 2 =40√2 cm² . This is your answer

Akanksha Kumari 4 years, 11 months ago

Given Side a = 18 cm Side b = 10 cm Perimeter = 42 cm = a + b + c Putting value 42 = 18 + 10 + c 42 = 23 + c 42 - 28 = c Now S = ( a + b + c)/2 Putting value S = 42 / 2 S = 21 Now according to heron's formula Area of triangle √{s(s-a)(s-b)(s-c)} Putting value √{21(21-18)(21-10)(21-14)} √{21(3)(11)(7)} √4851 21√11 cm Square Áñßwér

Pravin S 4 years, 11 months ago

let, side a=18 cm, side b=10cm, and c =x and the perimeter is 42 cm now , to find the c , 18+10+x=42 28+x=42 x=42-28 x=14cm. so, c=14cm S=a+b+c/2 S=18+10+12/2 S=20cm Area of triangle by herons formula=√ S(S-a)(S-b)(S-c) =√ 20(20-18)(20-10)(20-12) =√20 X 2 X 10 X 8 =√5 X 4 X 2 X 5 X 2 X 4 X 2 =5 X 4 X 2 √ 2 =40√2 cm² .

ANSWER

What do you mean by ordinate of point

Posted by Bhavesh Kunar 4 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Akanksha Kumari 4 years, 11 months ago

In the coordinate system, the term “Ordinate” refers to the y -coordinate in (x, y). In short, the distance along the y-axis is called the ordinate. ... The term “coordinate” represents the position of the point along the line, arc and so on, whereas the term “ordinate” represents the value of a coordinate on the y-axis.

ANSWER

The diameter of a metallic ball is 8.4 cm . What is the mass of a ball if the density of a metal is 10gm/cm3.

Posted by Anisha Agrahari 4 years, 11 months ago

CBSE > Class 09 > Mathematics

3 answers

Ayush Tiwari 4 years, 11 months ago

4/3πr³, = 4/3 ×22 /7 × 8.4³, =2483712cm³, To gram, 2483.712 cm³ × 10g/cm³ = 24837.12g

Ameen Khan 4 years, 11 months ago

Radius =8.4/2 Volume=10 Volume of sphere =4/3πr^3 10=4/3*22/7*8.4/2*8.4/2*8.4/2 =310.464 answer

Chiranjeev Kumar 4 years, 11 months ago

564.48

ANSWER

Arrange in ascending order 3684,4686,3783,6845,22

Posted by Dilkhush Nayak 4 years, 11 months ago

CBSE > Class 09 > Mathematics

2 answers

Anmol Preet 4 years, 11 months ago

22, 3684, 3783, 4686, 6845

Sukriti Gupta 4 years, 11 months ago

22, 3684, 3783, 4686, 6845

ANSWER

Ch 6 ex 4

Posted by Chandan Singh Yadav 4 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Aryan Sharma 4 years, 10 months ago

Here, we need to draw a line AB parallel to line PQ, through point M as shown in Fig. 6.25. Now, AB || PQ and PQ || RS Therefore, AB || RS (Why?) Now, ∠ QXM + ∠ XMB = 180° (AB || PQ, Interior angles on the same side of the transversal XM) But ∠ QXM = 135° So, 135° + ∠ XMB = 180° Therefore, ∠ XMB = 45° (1) Now, ∠ BMY = ∠ MYR (AB || RS, Alternate angles) Therefore, ∠ BMY = 40° (2) Adding (1) and (2), you get ∠ XMB + ∠ BMY = 45° + 40° That is, ∠ XMY = 85°

ANSWER

in maths which chapter is deleted or which exercise is deleted in class 9

Posted by Sharad Srivastav 4 years, 11 months ago

CBSE > Class 09 > Mathematics

3 answers

Aryan Sharma 4 years, 10 months ago

visit this site http://cbseacademic.nic.in/web_material/CurriculumMain21/revisedsyllabi/Deduction/DELETEDMathematics_Sec_2020-21.pdf

Tamanna Patel 4 years, 11 months ago

Ch.5 and ch.9 this chapters are deleted and some topics of another chapters are deleted Your teacher have not taught you the portion..??

Harsh Raj 4 years, 11 months ago

Deleted chapters = Introduction to Euclid Geometry , area of parallelogram and triangle and inequalities in triangle chapter

ANSWER

in maths which chapter is deleted or which exercise is deleted in class

Posted by Sharad Srivastav 4 years, 11 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

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