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15-06-2020
Mathematics

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

Respuesta :

15-06-2020

Answer:

Step-by-step 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

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