“The flag of a country contains an isosceles triangle. If the measure of the third angle of the triangle is 15° more than the measure of either of the two angles, find the measure of each angle of the triangle.”

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

23

step-by-step explanation:

b and c

step-by-step explanation: