Question

3)
Find the value of y

90° +15° +2y+y​

Answer 1

i think the sum is 180°

90°+15°+2y+y = 180°

90 + 15 =105

2y + y =3y

105° + 3y = 180°

3y = 180 - 105 = 75

y = 75 ÷ 3 = 25°

90° + 15° + 50° + 25° = 180°