Question

Please hurry and help me!!!!

find the semicircular. Either enter an exact answer in terms of n pi or use 3.14 for n and enter your answer as a decimal.
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Answer 1

Area = 25.12 square units.

Perimeter = 20.56 units

Explanation:

If you are looking for area, here goes:

Area of circle = π * r^2

Area of semi-circle = S = (1/2) *π * r^2

S = (1/2)*π*(4^2) = (1/2)π*16 = 8π square units = 25.12 square units

Or if you are looking for the perimeter:

Circumference C = 2*π*r

Half-circumference = (1/2)C = (1/2)*2*π*r = π*r = π*4

Perimeter of semi-circle = 4 + 4 + 4π = 8 + 4π