The length of a rectangle is (12-4x) units. the perimeter of the rectangle is 42-8x+4y units. part a describe how you con find an expression for the width of the rectangle. part b write a simplified expression to represent the width, in units, of the rectangle.

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im not sure

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