Above are two different models of the same pentagon. If the length of side b is 36 cm, what is the length of side a?
A.
18 cm
B.
9 cm
C.
32.25 cm
D.
45 cm
A. 18 cm
Explanation: By examining the two pentagon models, it can be observed that side a is half the length of side b. Therefore, if side b is 36 cm, then side a would be 18 cm.