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

Sides of triangular cloth a=20cm , b=50cm, c= 50cm S=20+50+50/2 = 120/2 = 60cm Area of triangle = use heron's formula here That is ::: root s( s-a) ( s- b) ( s- c) Put the value of s , a , b and c And your answer will be 200root 6cmsquare Area of 5 triangular pieces of one colour = 5×200 root6= 1000root6cm square Area of 5 pieces of other colour= 5×200 root6= 1000root 6 square I hope this is clear to you

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13.4 q no6

Posted by Kaushal Kumar 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Mani Gehlot 4 years, 6 months ago

1000 value

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ABCD is a square . its diagonals AC and BD intersect each other at O. Find the measure of angle cad and angle dbc

Posted by Paarth Varshney 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Shreya Chawla 4 years, 5 months ago

ABCD is a square whose diagonals AC and BD intersect each other at right angles at O. (i)∴∠AOB=∠AOD=90 ∘ In △ANB ∠ANB=180 ∘ −(∠NAB+∠NBA) ⇒∠ANB=180 ∘ −(45 ∘ + 2 45 ∘ ) since NB is bisector of ∠ABD ⇒∠ANB=180 ∘ −45 ∘ − 2 45 ∘ ⇒∠ANB=135 ∘ − 2 45 ∘ But ∠LNO=∠ANB(vertically opposite angles) ∴∠LNO=135 ∘ − 2 45 ∘ ........(1) Now in △AMO, ∠AMO=180 ∘ −(∠AOM+∠OAM) ⇒∠AMO=180 ∘ −(90 ∘ + 2 45 ∘ ) since MA is bisector of ∠DAO ⇒∠AMO=180 ∘ −90 ∘ − 2 45 ∘ ⇒∠AMO=90 ∘ − 2 45 ∘ ........(2) Adding (1) and (2) we get ∠LNO+∠AMO=135 ∘ − 2 45 ∘ +90 ∘ − 2 45 ∘ ⇒∠LNO+∠AMO=225 ∘ −45 ∘ =180 ∘ ⇒∠LNO+∠AMO=180 ∘ (ii)∠BAM=∠BAO+∠OAM ⇒∠BAM=45 ∘ + 2 45 ∘ =67 2 1 ∘ And ⇒∠BMA=180 ∘ −(∠AOM+∠OAM) ⇒∠BMA=180 ∘ −(90 ∘ + 2 45 ∘ ) ⇒∠BMA=90 ∘ − 2 45 ∘ =67 2 1 ∘ ∴∠BMA=∠BAM (iii) In quadrilateral ALOB ∵∠ABO+∠ALO=45 ∘ +90 ∘ +45 ∘ =180 ∘ ∴,ALOB is a cyclic quadrilateral.

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248410 +750

Posted by Emo . 4 years, 6 months ago

CBSE > Class 09 > Mathematics

5 answers

Anamika Sharma 4 years, 5 months ago

249,160

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Official Harshit 4 years, 5 months ago

Your Answer Is 249160?

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.......... .......... 4 years, 5 months ago

249160

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Rohit Saini 4 years, 6 months ago

249160??

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Vikas Gurjar 4 years, 6 months ago

249160

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Algeria indendis

Posted by Devendra Nagar Nagar 4 years, 6 months ago

CBSE > Class 09 > Mathematics

2 answers

Adarsh Kumar 4 years, 6 months ago

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Adarsh Kumar 4 years, 6 months ago

A Plus Topper Algebraic Identities Of Polynomials - A Plus Topper

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(3a-7b-c)²

Posted by Mudit Kumawat 4 years, 6 months ago

CBSE > Class 09 > Mathematics

2 answers

Adarsh Kumar 4 years, 6 months ago

(3a-7b-c)² =(3a)² +(-7b)² +(-c)² +2(3a)(-7b) +2(-7b)(-c) +2(-c)(3a)_____________=9a²+49b²+c² -42ab+14bc-6ac✓✓✓✓

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Ayush Raj 4 years, 6 months ago

Sdddffft

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Properties of isosceles triangle

Posted by Srishti Parihar 4 years, 6 months ago

CBSE > Class 09 > Mathematics

4 answers

Official Harshit 4 years, 5 months ago

I will Provide You Very Best Solution It is The Triangle have Two same side and one different side is called Isosceles Triangle ?

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Mukesh R Reddy 4 years, 6 months ago

Each geometric figure has some properties that make it different and unique from the others. Here is a list of a few properties of isosceles triangles: The two equal sides of an isosceles triangle are called the legs and the angle between them is called the vertex angle or apex angle. The side opposite the vertex angle is called the base and base angles are equal. The perpendicular from the vertex angle bisects the base and the vertex angle.

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Astha Verma 4 years, 6 months ago

The triangle which have two sides equal and one side and unequal is called an isosceles triangle

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Pra Jit 4 years, 6 months ago

Simple two sides and Angles are equal in an isosceles triangle?

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P(t)=2+t+2t²-t³

Posted by Mohd Iklakh 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Shreya Chawla 4 years, 5 months ago

P(t)=2+t+2t2-t3 then the values of p(0),p(1),p(2) are respectively p(t)=2+t+2t2-t3 p(0)=2+0+2*0*2-0*3 =2 p(1)=2+1+2*1*2-1*3 =4 p(2)=2+2+2*2*2-2*3 =9

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Ex 13.2 q-9

Posted by Bhaskar Parashar 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 4 years, 6 months ago

<a href="https://mycbseguide.com/course/cbse-class-09-mathematics/1234/">https://mycbseguide.com/course/cbse-class-09-mathematics/1234/</a>

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(5x-13y)

Posted by Maan Patel 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Official Harshit 4 years, 5 months ago

Answer Is The Same Thing You Have Written In Question 5x-13y

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The sides of a triangle are 61,54,35cm.find the length of the smallest and the longest altitude. .. Class 9 herons Formula .

Posted by Param Badhran 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Muskan Choudhary 4 years, 6 months ago

The length of its longest altitude is 53.665 cm. Sides of triangle --- a=35 cm , b=54cm & C = 61cm. Now ,. Area =√s(s-a)(s-b)(s-c). Where S = a+b+c/2. • s=35+54+61/2 = S= 75. Now area = √75(75-35)(75-54)(75-61). = Area = 939.1485cm² smallest side is 35cm so, area of triangle = 1/2 ×base ×height = 939.1485=1/2×35×height = 939.1485×2/35 = Height. Now height = 53.665. Hence the length of its longest altitude is 53.665Cm

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Find the square root of 121 x 400 x 961.

Posted by Arya Patil__ 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Chaithanya Kumar 8Th Class 4 years, 5 months ago

121×400×961=46512400 Square root of 46512400=6820

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express 144 as the sum of first consecutive odd numbers. Pls help me to solve this?

Posted by Arya Patil__ 4 years, 6 months ago

CBSE > Class 09 > Mathematics

2 answers

Arya Patil__ 4 years, 6 months ago

Thank you very much ☺️

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Shreyashree Mishra 4 years, 6 months ago

1+3+5+7+9+11+13+15+17+19+21+23 Hope it will help you ?

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to obtain the square root of any given positive real number (say 6.5) through an activity involving paper folding and construction geometry

Posted by Amrita Ghoshal 4 years, 6 months ago

CBSE > Class 09 > Mathematics

0 answers

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Can zero is a rational number

Posted by Darshil Purohit 4 years, 6 months ago

CBSE > Class 09 > Mathematics

5 answers

Shaurya Maini 4 years, 6 months ago

Yes it is a rational number because it can be expressed in the form 0/1 and 0/2

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? Akanksha Dhaka ? 4 years, 6 months ago

Yes zero can be rational number

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Aaditya Sharma 10 4 years, 6 months ago

Yes

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Mayank Rawandhe 4 years, 6 months ago

Yes

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Sudha Chauhan 4 years, 6 months ago

Yes,zero can be a rational number bc we can represent 0 in p/q form as 0/1 or 0/2 and many more

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What is SAS?

Posted by Shubham Kumar 4 years, 6 months ago

CBSE > Class 09 > Mathematics

5 answers

Bhavna Sharma 4 years, 5 months ago

Side angle side

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Shreyashree Mishra 4 years, 6 months ago

It's side-angle-side Now a question may arise in your mind that what's it actually? It means that is in two triangles,two angles and the corresponding sides are equal then we can say that both the triangles are congruent.

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Mayank Rawandhe 4 years, 6 months ago

Yes the same answer

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Parth Variya 4 years, 6 months ago

SAS (side angle side)by this criteria we can prove that two triangle are congruent

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Trisha Verma 4 years, 6 months ago

Side angle side is criteria to prove triangles congruent .

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6/5148=

Posted by Mahir Hussain 4 years, 6 months ago

CBSE > Class 09 > Mathematics

2 answers

Mayank Rawandhe 4 years, 6 months ago

You have done it or used calculator

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Pra Jit 4 years, 6 months ago

By long division method I got the answer as 0.00116550116 (in which the. 00116550116 are repeated numbers as the term 6/5148 is a non-terminating form)

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2-1=

Posted by Mahir Hussain 4 years, 6 months ago

CBSE > Class 09 > Mathematics

5 answers

Shubham Kumar 4 years, 6 months ago

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Pra Jit 4 years, 6 months ago

=1??

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Pra Jit 4 years, 6 months ago

2-1 = 2-1 = 2-1 = 2-1 ...

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Gurjoban Preet 4 years, 6 months ago

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Shaurya Singh 4 years, 6 months ago

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A polynomial containing one-zero t erm is called

Posted by Vrushali Wanave 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Pra Jit 4 years, 6 months ago

Monomial

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The difference between the sides at right angles in a right angle triangle is 14 cm . The area of triangle is 120cm² . Calculate the perimeter

Posted by Vaishnavi Rathi 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Sia ? 4 years, 6 months ago

let one side at right angle be x
the other must be x-14

area of a triangle =(1/2) × (height) (base)
120 = (1/2)(x)(x-14)
120 = (x^2 -14x)/2
240 = x^2 -14x

x^2 -14x -240 = 0
x^2 -24x +10x -240 =0
x (x-24) + 10 (x-24) =0
(x-24)(x+10)=0

now, find x
x-24 =0
x = 24

again
x+10 =0
x = -10

as the side couldn't be -v so the value of x as a side must be 24cm
so the measure of one side we got is x =24cm and the other side = x-14 = 24 -14 =10cm
apply pythagoras theorem for third side as it is a right angled triangle
[let hypotaneous be a]
(24)^2 + (10^2) = a^2
576 +100 = a^2
676 = a^2
a = 26 cm
so the hypataneous = 26cm
perimeter of a triangle = sum of all sides
= (24 + 10 + 26 ) cm
= 60cm