Can someone me with 2 last questions? will mark : )

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

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh