Equilateral triangle: all sides of triangle are equal. ... To calculate the area of an equilateral triangle, use the formula below: Area of An Equilateral Triangle = (√3)/4 × side 2.

It introduces the formula for calculating the area of a triangle and explains the ... and engineering. Keywords triangles, properties, types, equilateral, isosceles, scalene, congruency, area ...

Learn about and revise angles, lines and multi-sided shapes and their properties with this BBC Bitesize GCSE Maths Edexcel study guide.

Formula triangles can be used to help with rearranging the equation, but it is important that the algebraic method for rearranging is understood.