Question

Question 4 (Multiple Choice Worth 4 points)

(05.03)Calculate the area of the regular pentagon below:

A regular pentagon with side length of 22.3 inches and dotted line from center to middle of side of 15.4 inches.

686.84 square inches
732.34 square inches
858.55 square inches
1717.1 square inches

Answer 1

The dotted line and the length of one edge should give you a very strong clue. Does that look like it might relate to a triangle?

Answer 2

please you have to aplly this formual, area A, equals to:
\[area=\frac{ (perimeter*apothem) }{ 2 }\]

Answer 3

think about it:

A pentagon has 5 equilateral triangles

Area of a triangle = 1/2 bh

So you can kind of think of it like finding the area of 5 equilateral triangles and adding them all up. Dunno, just kind of another way to think about it.