CBSE > Class 09 > Mathematics | CBSE Board | Homework Help

Proof :in ∆ BAD and ∆CAD , BA = CA ( given) angle BAD = angle CAD ( By. Construction) AD =AD (common) ∆BAD =(~) ∆ CAD (By SAS Congruence) angle DBA=angle DCA. ( By C.P.C.T ) angle B = angle C. ( Hence proved )

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Punam Vishwakarma 5 years, 2 months ago

∆ ABCD AD Midian of BC

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Punam Vishwakarma 5 years, 2 months ago

Given: triangle ABC is an isosceles in which AB =AC To prove : angle B =angle C Construction:Draw the bisector of angle A . Let D be the point of intersection of this bisector angle A on angle BC .

2Thank You

Punam Vishwakarma 5 years, 2 months ago

Statement: angles opposite to equal side of an isosceles triangle are equal

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ANSWER

if height and radius of a cone are h and r respectively and it is given that height of cone is same as diameter of base,then find the slant height.

Posted by Parth Bhandari 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Rajneesh Payal 5 years, 2 months ago

120

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ANSWER

(9/0)/(9/0)

Posted by Meghana Prajapati 5 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Yashraj Chandel 5 years, 2 months ago

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Rajneesh Payal 5 years, 2 months ago

81/0

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ANSWER

If a pair of opposite side of a cyclic quadrilateral are equal prove that its diagonal are also equal

Posted by Deepanshu Pandey 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 2 months ago

Let ABCD be a cyclic quadrilateral and AB = CD.
⇒ arc AB = arc CD (Corresponding arcs of the equal chords)
Adding arc AD to both the sides of the equation;
arc AB + arc AD = arc CD + arc AD
∴ arc BAD = arc CDA
⇒ Chord BD = Chord CA
⇒ BD = CA

Hence, when pair of opposite sides of a cyclic quadrilateral are equal, diagonals are also equal.

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ANSWER

What are the identities of number syestem

Posted by Shravya Shetty 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Prabhjot Kaur 5 years, 2 months ago

1) (a+b)^2 = a^2 + b^2 + 2ab 2) (a-b) ^2 = a^2 + b^2 - 2ab 3) (a^2 - b^2) = (a+b) (a-b) 4) (a+b+c) = a^2 + b^2 + c^2 + 2ab + 2bc + 2ca 5) (a+b)^3 = a^3 + b^3 + 3ab (a+b) 6) (a-b) ^3 = a^3 - b^3 - 3ab (a-b) 7) (a^3 + b^3) = (a+b) (a^2 - ab + b^2) 8) (a^3 - b^3) = (a-b) (a^2 + ab + b^2) 9) (a^3 + b^3 + c^3 - 3abc) = (a+b+c) (a^2 + b^2 + c^2 - ab -bc - ca) 10) (x+a) (x+b) = x^2 + (a+b) x + ab 11) if a + b + c = 0, then a^3 + b^3 + c^3 = 3abc

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What is the area of an equilateral triangle with side root 3 by 4

Posted by Ram Niwas Malik 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Amrit Raj 5 years, 2 months ago

3√3/64

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Write 2 solution for the following equation 3x+4y=7

Posted by Iyaz Ismail 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Amritha Anand 5 years, 2 months ago

Solution 3x+4y=7 X=1..y=1 Therefore 3+4=7 If x=2..y=1/4 Therefore 6+1=7

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What is parrallel line

Posted by Premchand Rathor 5 years, 2 months ago

CBSE > Class 09 > Mathematics

3 answers

Kanika Sharma 5 years, 2 months ago

The lines which never intersect each other are called parallel lines.

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Satyam Singh 5 years, 2 months ago

Parallel line are two lines is equal distance a part never touch it parallel lines (ll).

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Mortal Combat 5 years, 2 months ago

parallel lines are two lines that does not meet each other at any point.

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ANSWER

Chapter 9 exercise 9.1

Posted by Nagender Nagar 5 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

A number is irrational if its decimal representation is

Posted by Mohit Saini 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Vishal Rawat 5 years, 2 months ago

Non terminating

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If diagonals of a quardilatetal bisect each other proove that it is a ractangle

Posted by Mayank Purohit 5 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Factorise x^2 - 3

Posted by Priyanshu Yadav 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Rajneesh Payal 5 years, 2 months ago

X (x-3)

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ANSWER

Without actually calculating the cubes find the value of 45,25,20

Posted by Rajkumar Parjapati 5 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Prabhjot Kaur 5 years, 2 months ago

But your statement is wrong It must be 45 + (-25)+ (-20) So. 45 - 45 =0 Then 3 * 45 * -25 * -20 = 67,500

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Prabhjot Kaur 5 years, 2 months ago

If a + b + c = 0 then a^3 + b^3 + c^3 = 3 abc

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ANSWER

If x÷y+y÷x= -1for x not equal to0 then find x cube - y cube

Posted by Ajul Thara 5 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Find three solution of 4x+3y=12

Posted by Muneeswari K 5 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Yaadavi Tandon 5 years, 2 months ago

First, put x=0 4(0)+3y=12 0+3y=12 So, y=4. (0,4) Now, put y=0 4x+3(0)=12 4x+0=12 So, x=3 (3,0) Put y=1 4x+3(1)=12 4x+3=12 4x=9 So, x=9/4 i.e 2.25 Or u can fill any other value in place of y=1

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Bhagyesh Chaudhari 5 years, 2 months ago

12 - 4x =3y

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ANSWER

Probability kese ko samj nhi a raha hai

Posted by Vipin Yadav 5 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Mortal Combat 5 years, 2 months ago

man laga ke par aa jae ga

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Shivam Upadhyay 5 years, 2 months ago

y-2=0

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ANSWER

What is the TSA of right circular cylinder

Posted by Saksham Chugh 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Tanisha Garg 5 years, 2 months ago

(2πr)^2 *h

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ANSWER

Find the value of k if,(x+3) is a factor of 3x^2+kx+6

Posted by Kittu Chauhan 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Shivam Shukla 5 years, 2 months ago

-6

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ANSWER

8888+569

Posted by Rupa Debbarma 5 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Saksham Chugh 5 years, 2 months ago

9457

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How to justify our construction

Posted by Vimal Agrawal 5 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

In square ABCD, if AC=12cm , then ar(ABCD)=______ cm square

Posted by Parag Mahajan 5 years, 2 months ago

CBSE > Class 09 > Mathematics

6 answers

Kanika Sharma 5 years, 2 months ago

How the answer is 144 cm square

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Kanika Sharma 5 years, 2 months ago

Sorry for my mistake 72 cm square is the answer.

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Vishal Rawat 5 years, 2 months ago

144

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Saksham Chugh 5 years, 2 months ago

144cm

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Kanika Sharma 5 years, 2 months ago

If ABCD is a square We know that diagonals of a square perpendicularlly bisect each other and are equal So if Ac=12cm Then bd =12cm And od=1\2 bd , oa =1\2ac So od =6cm ,oa=6cm Then in right triangle AOD By using Pythagoras theorem (Ad)2=(oa)2+(od)2 (Ad)2= (6)2+(6)2 Please solve this problem ahead As my keyboard has no root symbol. The answer will be under root 72 cm square. ☺☺

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Aaditya Pathak 5 years, 2 months ago

144cm

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ANSWER

(a+b) whole squre

Posted by Anshu Goutam 5 years, 2 months ago

CBSE > Class 09 > Mathematics