Question

What is the value of y?

y +10°
50°
A. 500
B. 40°
C. 60°
ОО
D. 300

Answer 1

B

Explanation:

The sum of the 3 angles in a triangle = 180° , then

y + 10 + 2y + 50 = 180 , that is

3y + 60 = 180 ( subtract 60 from both sides )

3y = 120 ( divide both sides by 3 )

y = 40 → B

Answer 2

B

Explanation:

50° + (Y+40°) + 2Y= 180°

180°-50°-40°=3Y

90÷3=3Y÷3

Y=30