find the area of an Equalateral triangle (regular 3-gon) with the given measurement 9 inch perimeter? A= sq. in.

asked Nov 28, 2021 49.0k views

1 vote

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5 votes

Answer:

Explanation:

P= 3a ( a is the side of triangle)

a=P/3 =3

A=√3/4 a^2

= √3/4 * 9 = 3.9 sq. inch

Tom Lynch answered Dec 4, 2021

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