Question

. In the given figure, if angle A = 70° , angle B = 80° and x = 2y , then find the value of y ? *
3 points
​

Answer 1

Answer:

y=50°

Step-by-step explanation:

∆ABC

A+B+C=180⁰

70+80+ C = 180⁰

150+ C=180⁰

C=180⁰-150⁰

C=30⁰

x=2 y

x+y+30=180⁰

2 y + y + 30⁰=180⁰

3y = 180⁰-30⁰

y=150⁰/3

y = 50⁰

OR

-------------

A=x

Alternate angle. So,

A=70 = x

C = 30

y+30+70 = 180

y=180°-100°

y=80°

Answer 2

Answer:

50 or 80 ........................