Question

What is the best approximation for the perimeter of a semicircle with a diameter of 64 meters?

Answer 1

 By definition, the perimeter of a semicircle is given by:
 $P = ( \pi ) * (r) + d$ 
 Where,
 d: diameter of the semicircle
 r: radius of the semicircle.
 The radius of the semicircle is given by:
 $r = d / 2$
 Where,
 d: diameter of the semicircle
 Substituting values:
 $r = 64/2 r = 32 m$ 
 Then, the perimeter is:
 $P = (3.14) * (32) + 64 P = 164.48 m$
 Answer:
 The perimeter of the semicurcle is given by:
 P =  164.48 m

Answer 2

Answer: 164.48

Step-by-step explanation:

and don't forget we all have different answers :D