Posted by **ben** on Tuesday, February 1, 2011 at 11:18am.

Find the area of an equilateral triangle (regular 3-gon) with the given measurement.

6-inch side.

A = sq. in.

- math -
**Ms. Sue**, Tuesday, February 1, 2011 at 11:38am
Draw a straight line from the mid point of one side to the opposite vertex.

Use the Pythagorean Theorem to find the length of this line. Let b = this line (the height).

a^2 + b^2 = c^2

3^2 + b^2 = 6^2

9 + b^2 = 36

b^2 = 27

b = 5.2

Now use this formula to find the area of this triangle.

A = 1/2bh

- math -
**Anonymous**, Tuesday, February 1, 2011 at 6:44pm
In en.wikipedia type:

"equilateral triangle"

You will find everything about equilateral triangle

- geometry -
**daniel**, Saturday, June 8, 2013 at 12:40am
What is the area of a equlateral triangle with the measurement of 6-inch side?

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