So my teacher gave us this paper to do for homework, how do i do it?

Area

Find the area of each of the shapes and then add them together.

Area of the rectangle is L x W = 12 x 8 = 96

Area of the semicircle is (π · r² )/2 = (π · 4²)/2 = 8π

Total Area = 96 + 8π ≈ 121 ft²

Perimeter

Find the perimeter of each of the shapes, add them together, and subtract the common side.

Perimeter of rectangle is 2L + 2W = 2(12) + 2(8) = 24 + 16 = 40

Perimeter of the semicircle is (2 · π · r)/2 = π · r = π · 4 = 4π

Common side is 8

Total Perimeter = 40 + 4π - 8 = 32 + 4π ≈ 44.57 ft

Area ≈ 121 ft², Perimeter ≈ 44.57 ft

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.