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### Equilateral Triangle

Equilateral Triangle is a polygon composed by 3 equal sides and equal all interior angles.
The polygon is a closed plane figure composed by a non specified number of straight line segments that join in pairs at their endpoints. So, the equilateral triangle is a polygon with three equal sides.
As, in any triangle, the sum of the interior angles of an equilateral triangle is 180 degrees, so, every one of its angles measures 60 degrees.
A corner of a triangle is known as a vertex. The opposite side is that side which is opposite to a given vertex. The adjacent side is that share the same vertex.
The angle is the opening formed by two line segments, connected together at their extremities. The angles may be measured in degrees and radians. The most common unit of measure is degrees. The radian is an angular measure of an arc whose value corresponds to the radius of the circle that contains the arc. For the conversion purposes, 1 degree is equals Π / 180 radians and 1 radian equals 180/ Π degrees.
How to calculate the elements of Equilateral Triangle.