Question

What is the perimeter of a semicircle if the diameter is 2

Answer 1

Answer: π+2

Explanation:

perimeter of a whole circle is

2πr

r = 1

2π

divide by 2 bc its a semicircle

2π/2 = π

π+diameter

π+2

Answer 2

Explanation:

d = 2

arc length of semicircle = ½×circumference = ½×πd = π

perimeter of semicircle = π + d = π+2