The penguin exhibit at a zoo has a raised circular island that is surrounded by water. the diameter of the island is 20 meters. one penguin swims half way around the island before hopping out. how far did the penguin swim?

31.4 meters

Step-by-step explanation:

C = 3.14  X (diameter)

3.14 X 20 = 62.8 meters

The penguin swims half way around:

62.8 / 2 = 31.4 meters

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.