Which shows equivalent expressions? a squared + 3 b minus 2 a squared = 3 a squared + 3 b minus 4 a squared
a squared + 3 b minus 2 a squared = 3 a squared + 4 b minus 4 a squared
Negative a squared + 3 b minus 2 a squared = 3 a squared + 3 b
Negative a squared + 3 b + 2 a squared = 3 a squared + 4 b minus 2 a squared

answer:     true

step-by-step explanation:

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