Answer:
Step-by-step explanation:
Remark
This is a regular pentagon. The information given is enough the find the area of 1 triangle. There are 5 such triangles. So find the area of 1 of the triangles. The answer will be 5 times as much.
Givens
b = 18.3
h = 12.6
Formula
1 triangle = 1/2 * b * h
5 such triangles = 5 times as much
Solution
Area(1_triangle) = 1/2 * 18.3 * 12.6
Area (1_triangle) = 115.29
Answer: 5 * 115.29
Answer: 576.45
