Answer:
A = 84.3
Step-by-step explanation:
Given the formula for the Pentagon:
1/4√5(5+2√5)a^2
The first step is to simplify the expression.
[tex]\frac{49\sqrt{25+10\sqrt{5}}}{4}[/tex]
The second step is to convert it to a decimal form.
84.30339262
The last step is to round 84.30339262.
84.3
I hope this helped!
