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Find the area of an equilateral triangle (regular 3-gon) with the given measurement.
6-inch apothem
A = sq. in.

Click an item in the list or group of pictures at the bottom of the problem and, holding-example-1
User Awendt
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2 Answers

3 votes

Answer:

just had this question :/ 108√3

Explanation:

User Iammichael
by
6.3k points
5 votes

Answer:


\boxed{108√(3)\text{ in}^(2)}

Explanation:

An apothem is a perpendicular drawn from the centre of the triangle to one of its sides.

The three apothems OD, OE, and OF divide ∆ABC into six smaller congruent triangles.

1. Area of ∆OCD

CotOCD = OD/OC

cot30 = CD/6

√3 = CD/6

CD = 6√3

A= ½bh

A = ½ × 6√3 × 6 = 18√3 in²

2. Area of ∆ABC

A = 6 × area of ∆OCD = 6 × 18√3 = 108√3 in²


\text{The area of the triangle is }\boxed{108 √(3) \text{ in}^(2)}

User OleVik
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