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Definition of Equilateral Triangle - Math is Fun
A triangle with all three sides of equal length. All the angles are 60°
How to construct (draw) an equilateral triangle with ...
This page shows how to construct an equilateral triangle with compass and straightedge or ruler. It begins with a given line segment which is the length of each side of the desired equilateral triangle. It works because the compass width is not changed between drawing each side, guaranteeing they are all congruent (same length). It is similar to the 60 degree angle construction, because the ...
Math Forum: Ask Dr. Math FAQ: Triangle Formulas
Formulas for finding the area, perimeter, etc. of a triangle.
Triangle - Wikipedia
By lengths of sides. Triangles can be classified according to the lengths of their sides: An equilateral triangle has all sides the same length. An equilateral triangle is also a regular polygon with all angles measuring 60°.; An isosceles triangle has two sides of equal length. An isosceles triangle also has two angles of the same measure, namely the angles opposite to the two sides of the ...
Triangles - Equilateral, Isosceles and Scalene
Equilateral, Isosceles and Scalene. There are three special names given to triangles that tell how many sides (or angles) are equal. There can be 3, 2 or no equal sides/angles:
Area of equilateral triangle (video) | Khan Academy
Finding the formula for the area of an equilateral triangle with side s
Amazon.com: AccuQuilt GO! Equilateral Triangle 4.1/2 Sides ...
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Turn an Equilateral Triangle into a Square
Turn an Equilateral Triangle into a Square. A classical puzzle in recreational math is to dissect a shape into pieces that can be rearranged into another shape.
Amazon.com: Quilter's Equilateral Triangle Ruler 6 Inches ...
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Isosceles Triangle -- from Wolfram MathWorld
Isosceles Triangle. An isosceles triangle is a triangle with (at least) two equal sides. In the figure above, the two equal sides have length and the remaining side has length .This property is equivalent to two angles of the triangle being equal.