Q:

I need help finding x, Ik they should all add up to 180 after x is found. But I’ve been trying different ways and I can’t do it. Someone please help me

Accepted Solution

A:
Answer:x = 42.5Step-by-step explanation:Since the triangle is isosceles then the 2 base angles are congruent.The base line is a straight angle hence the base angle is180 - 3xThe sum of the 3 angles in the triangle = 180°, hence2x - 10 + 180 - 3x + 180 - 3x = 180- 4x + 350 = 180 ( subtract 350 from both sides )- 4x = - 170 ( divide both sides by - 4 )x = 42.5-------------------------------------------2x - 10 = (2 × 42.5) - 10 = 75180 - 3x = 180 - (3 × 42.5) = 52.5Sum of 3 angles = 75 + 52.5 + 52.5 = 180° ← correct