Question

EMERGENCY!!! DUE VERY SOON HELP!

A regular octagon has an apothem of 14.1 yd and a side length of 11.7 yd.  What is the area of the regular octagon?  If necessary, round your answer to the nearest whole number.

A regular heptagon (7-sided figure) has an apothem of 21.8 m and a side length of 21 m.  What is the area of the regular heptagon?  If necessary, round your answer to 1 decimal place.

 A regular pentagon has an apothem of 7.3 in. and a side length of 10.6 in.  What is the area of the regular pentagon?

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Answer 1

Answer: I thinks it's 193.313

Step-by-step explanation: Let’s take the pentagon with side length 11.7 yards and apothem length 14.1 yards

Area of pentagon is = 5/2 x s x a

= 5/2 x 11.7 x 214.1

=6262.425 square centimetres.

Example 2 : Find the area of a pentagon of side 11.7 yards and apothem length 14.1 yards ?

Solution :

Given,

s = 11.7 yds

a = 14.1 yds

Area of a pentagon

= 193.313 yds