What is the area of a regular 15 sided polygon that has a perimeter of 225cm?

What is the area of a regular 15 sided polygon that has a perimeter of 225cm?
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The regular 15 sided polygon will have 15 congruent isoscelestriangles each having equal base angles of 78 degrees and an apexangle of 24 degrees with two equal sides of 36.07300759 cm and abase of 15 cmArea: 0.5*36.07300759^2 *sin(24)*15 = 110.042 square cm roundedto three decimal places
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