Answer:
9) 180 = 45 + b + 3b
10) 180 = 2Y + X + Y
Step-by-step explanation:
9) a triangle's interior angle sum is 180. So you would format out the problem as:
180 = 45 + b + 3b.
10) the triangle is an isosceles triangle from the description of 2 equal angles. It states Z is twice as big as Y, so you would put it as 2Y. So the equation would be 180 = 2Y + X + Y
