kamarmom kamarmom

12-06-2019
Mathematics

contestada

Find the area of a regular decagon with a 12.3 in, apothem and 8 in. sides.

A. 49.2 in.

B. 128 in

C. 492 in

D. 942 in.

Respuesta :

jimrgrant1 jimrgrant1

12-06-2019

Answer:

C

Step-by-step explanation:

The area (A) of a regular decagon is

A = [tex]\frac{1}{2}[/tex] perimeter × apothem

perimeter = 10 × 8 = 80 in, thus

A = 0.5 × 80 × 12.3 = 492 in² → D

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