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

Let the sides of triangle be x As we know triangle have 3 sides Hence, sides of triangle be=3x Sum of three sides of triangle=180° So, 3x=180° x=180/3 x=60° Hence each side of triangle is 60+60+60 Which is 180 Hence proved.....

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Neha Kanchan 4 years, 4 months ago

Sum of three angles is 180 degree

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Pooja Taliyan 4 years, 4 months ago

If you understand with this answer like please

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Pooja Taliyan 4 years, 4 months ago

TrianglePQR with angle <1,<2and <3. Then <1+<2+<3=180 degree <1+<4+<5=180 degree(linear pair). <1+<2+<3=180degree(from(1)and (2)

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Is maths interesting??

Posted by Neil :) 4 years, 4 months ago

CBSE > Class 09 > Mathematics

5 answers

Mohmmad Afsa 4 years, 4 months ago

Yes..

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Bhoomi Khanka 4 years, 4 months ago

If u will try to understand it u'll find it interesting

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Sneha .M Sneha.M 4 years, 4 months ago

Yes

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Tohfa Aazmi 4 years, 4 months ago

Yes, but not so.

4Thank You

Sujal Raj 4 years, 4 months ago

Yes

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ANSWER

Represent √15 on number line

Posted by Madhu Jha 4 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

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2x - 3y =5

Posted by Abhishek Raj 4 years, 4 months ago

CBSE > Class 09 > Mathematics

3 answers

Sakshi Puri 4 years, 4 months ago

8x+7y=56

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Bhavesh Choudhary 4 years, 4 months ago

2+3=5

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Aashima Aashima 4 years, 4 months ago

7/3 y

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ANSWER

x+12=24

Posted by Jai Joshi 4 years, 4 months ago

CBSE > Class 09 > Mathematics

5 answers

Shivanand Deshpande 4 years, 4 months ago

X+12=24 =》X=24-12 =》X=12 Hence required value of 'X' is 12

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Neeraj Pandey 4 years, 4 months ago

X + 12 = 24 X = 24 - 12 X = 12

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Rozeena Sz 4 years, 4 months ago

X+12=24 X=24-12 X=12

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Trisha Verma 4 years, 4 months ago

x=12

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Priyanshi Patel 4 years, 4 months ago

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ANSWER

Hey... I want to know what can I do with Refer and Earn points?

Posted by Mugdha ... 4 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Pooja Taliyan 4 years, 4 months ago

A simplest way you have buy a mobile and download winzo app to earn real coin i mean real points with coins

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Take a piece of plywood with dimensions 30cm x 30cm

Posted by Francis Francis 4 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

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

Posted by Dheer Patel 4 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Ishika Goyal 4 years, 4 months ago

√((21)(21-18)(21-10)(21-14))=69.64 aprox

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Neeraj Pandey 4 years, 4 months ago

let third side of triangle = x x + 10 + 18 = 42 ( Perimeter of triangle is 42 ) x + 28 = 42 ( Transpose of 28 in R.H.S. ) x = 42 - 28 x = 14 s = 42/2 ; s = 21 Area of triangle = √s(s﹣a)(s﹣b)(s﹣c) { Put s = 21, a = 18, b = 14, c = 10 } √ 21(21-18)(21-14)(21-10) √ 21*3*7*11 = √4851 = 69.64 (approx)

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Reeta was studying in the class 9th C of St. Surya Public school, Mehrauli, New Delhi-110030 Once Ranjeet and his daughter Reeta were returning after attending teachers parent meeting at Reeta's school. As the home of Ranjeet was close to the school so they were coming by waking. Reeta asked her father, "Daddy how old are you?" Ranjeet said, "Sum of ages of both of us is 55 years, After 10 years my age will be double of you. Now you find ages of both of us"

Posted by Samay Bothra 4 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Princy Agnihotri 3 years ago

ranjeet 40year reeta 15 year

47Thank You

Subham Mallick 2 years ago

ans

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ANSWER

The students of school staged a ralley for cleanliness campaign .they walked into two groups .one group walked through the P ,Q,Q,R and Rp. and another group walked through PR, RS,and Sp

Posted by Anusha Biradar 4 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Plot A(2,3);B(-1,0);C(2,0) and join them.Write the name of figure so formed also calculate it's area.

Posted by Bhanwar Jakhar 4 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

In the adjoining figure, what is the value of y

Posted by Sahana S 4 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Roshni Srivastav 4 years, 4 months ago

126

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ANSWER

Plz take a test

Posted by Astha Thapliyal 4 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Adarsh Kumar 4 years, 4 months ago

Solve EX- 12.5 Ka 10 no. From R.D. SHARMA

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What equation represent a line parallel to y axis

Posted by Ashutosh Mohanty 4 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Ishika Goyal 4 years, 4 months ago

x=5 Any value of x but y always considered as zero

0Thank You

Aadhaya Rastogi 4 years, 4 months ago

The equation of the line parallel to the y-axis is x = k, where 'k' is any real number. For example, considering the equation of a line, x = 3, for any value of 'y' the value of 'x' is always equal to 3.

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Hi everyone.. How r u all

Posted by Pranjal Yadav 4 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

H :H Harmeet Kaur 4 years, 4 months ago

I am fine

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ANSWER

The probability of occurring head on tossing a coin is

Posted by Vani Gk 4 years, 5 months ago

CBSE > Class 09 > Mathematics

3 answers

Mugdha ... 4 years, 4 months ago

1/2

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Pranjal Yadav 4 years, 4 months ago

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Neeraj Pandey 4 years, 5 months ago

The Probability of occurring Head on tossing a Coin is 1/2

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A park, in the shape of a quadrilateral ABCD, has C=90°, AB=9 m, BC=12 m, CD=5 m and AD=8 cm. How much area does it occupy?

Posted by Oorja Jain 4 years, 5 months ago

CBSE > Class 09 > Mathematics

2 answers

Anuj Chauhan 4 years, 5 months ago

BD = 12cm ( by using Pythagoreas theorem) In right angle triangle bcd Area = 0.5 x base x height = 0.5 x 12 x 5 AreaI =30 cm sq Area II = traingle ABD =Using herons formula =Root s(s-a)(s-b)(s-c) =Root 15 x 7 x 6 x 2 = 6 root 35 =35.496 cm sq Total area = 30 +35.496 = 65.5 cm sq

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Sejal Tiwari 4 years, 5 months ago

65.5 m square

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In the given figure show that AB||EF

Posted by Shashank Shukla 4 years, 5 months ago

CBSE > Class 09 > Mathematics