Definition of Equilateral Triangle - Math is Fun
Math explained in easy language, plus puzzles, games, quizzes, videos and worksheets. For K-12 kids, teachers and parents.
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.
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°.
Triangles - Equilateral, Isosceles and Scalene
Equilateral Triangle . Three equal sides Three equal angles, always 60° . Isosceles Triangle . Two equal sides Two equal angles
Area of equilateral triangle (video) | Khan Academy
Finding the formula for the area of an equilateral triangle with side s
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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.
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Isosceles Triangle -- from Wolfram MathWorld
An isosceles triangle is a triangle with (at least) two equal sides. In the figure above, the two equal sides have length b and the remaining side has length a. This property is equivalent to two angles of the triangle being equal.