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.....

1Thank You

Neha Kanchan 3 years ago

Sum of three angles is 180 degree

0Thank You

Pooja Taliyan 3 years ago

If you understand with this answer like please

2Thank You

Pooja Taliyan 3 years 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)

1Thank You

ANSWER

Is maths interesting??

Posted by Neil :) 3 years ago

CBSE > Class 09 > Mathematics

5 answers

Mohmmad Afsa 3 years ago

Yes..

0Thank You

Bhoomi Khanka 3 years ago

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

2Thank You

Sneha .M Sneha.M 3 years ago

Yes

1Thank You

Tohfa Aazmi 3 years ago

Yes, but not so.

4Thank You

Sujal Raj 3 years ago

Yes

1Thank You

ANSWER

Represent √15 on number line

Posted by Madhu Jha 3 years ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

2x - 3y =5

Posted by Abhishek Raj 3 years ago

CBSE > Class 09 > Mathematics

3 answers

Sakshi Puri 3 years ago

8x+7y=56

0Thank You

Bhavesh Choudhary 3 years ago

2+3=5

0Thank You

Aashima Aashima 3 years ago

7/3 y

2Thank You

ANSWER

x+12=24

Posted by Jai Joshi 3 years ago

CBSE > Class 09 > Mathematics

5 answers

Shivanand Deshpande 3 years ago

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

0Thank You

Neeraj Pandey 3 years ago

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

0Thank You

Rozeena Sz 3 years ago

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

0Thank You

Trisha Verma 3 years ago

x=12

0Thank You

Priyanshi Patel 3 years ago

2Thank You

ANSWER

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

Posted by Mugdha ... 3 years ago

CBSE > Class 09 > Mathematics

1 answers

Pooja Taliyan 3 years ago

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

1Thank You

ANSWER

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

Posted by Francis Francis 3 years 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 3 years ago

CBSE > Class 09 > Mathematics

2 answers

Ishika Goyal 3 years ago

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

0Thank You

Neeraj Pandey 3 years 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)

0Thank You

ANSWER

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 3 years ago

CBSE > Class 09 > Mathematics

2 answers

Princy Agnihotri 1 year, 7 months ago

ranjeet 40year reeta 15 year

46Thank You

Subham Mallick 8 months, 2 weeks ago

ans

36Thank You

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 3 years 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 3 years ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

In the adjoining figure, what is the value of y

Posted by Sahana S 3 years ago

CBSE > Class 09 > Mathematics

1 answers

Roshni Srivastav 3 years ago

126

0Thank You

ANSWER

Plz take a test

Posted by Astha Thapliyal 3 years ago

CBSE > Class 09 > Mathematics

1 answers

Adarsh Kumar 3 years ago

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

1Thank You

ANSWER

What equation represent a line parallel to y axis

Posted by Ashutosh Mohanty 3 years ago

CBSE > Class 09 > Mathematics

2 answers

Ishika Goyal 3 years ago

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

0Thank You

Aadhaya Rastogi 3 years 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.

1Thank You

ANSWER

Hi everyone.. How r u all

Posted by Pranjal Yadav 3 years ago

CBSE > Class 09 > Mathematics

1 answers

H :H Harmeet Kaur 3 years ago

I am fine

0Thank You

ANSWER

The probability of occurring head on tossing a coin is

Posted by Vani Gk 3 years ago

CBSE > Class 09 > Mathematics

3 answers

Mugdha ... 3 years ago

1/2

0Thank You

Pranjal Yadav 3 years ago

0Thank You

Neeraj Pandey 3 years ago

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

0Thank You

ANSWER

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 3 years ago

CBSE > Class 09 > Mathematics

2 answers

Anuj Chauhan 3 years 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

0Thank You

Sejal Tiwari 3 years ago

65.5 m square

3Thank You

ANSWER

In the given figure show that AB||EF

Posted by Shashank Shukla 3 years ago

CBSE > Class 09 > Mathematics