In a club, the ratio of the number of girls to the number of boys is 3 : 1 The ratio of girls that play a musical instrument to girls that don't is 3 : 2.
The ratio of boys that play a musical instrument to boys that don't is 4: 1.
What fraction of the children play a musical instrument?
Give your answer in its simplest from.

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