No products in the cart.

In triangle abc angle a+angle b …

CBSE, JEE, NEET, CUET

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

In triangle abc angle a+angle b =120°,angle a+angle c =130°. Find angle a
  • 1 answers

Tanya Singla 6 years, 6 months ago

Given: a+b=120 

Therefore, b=120-a ---Eq1

and, a+c=130

Therefore, c=130-a ---Eq2

Since we know that the sum of angles of a triangle is 1800

=> a+b+c=1800  ---Eq3

Putting values of b and c from Eq1 and Eq2 in Eq3

=> a+120-a+1300-a = 1800

=> 250-a =1800

=> -a = 180- 2500

=> angle a= 700

Now putting value of angle a in Eq1 and Eq2, we get

angle b= 120-70= 50and

angle c= 130-70= 600

 

http://mycbseguide.com/examin8/

Related Questions

Why is line and angle are not equal
  • 0 answers

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Download myCBSEguide App