Lesson: Equilateral Triangles Geometry • Concepts and Skills • Glencoe • Geometry • enVision • Geometry • Common Core • Prentice Hall • Geometry • Common Core • Glencoe • Geometry • Common CoreMathematics
In this lesson, we will learn how to identify equilateral triangles by their equal side lengths or equal angle measures to find a missing side length, perimeter, or area.
Sample Question Videos
Find the perimeter of the shape below.
One side of an equaliteral triangle has length . Another side has length . Find the perimeter of the triangle.
The perimeter of an equilateral triangle is equal to the perimeter of a rectangle with a length of 5 cm and a width of 4 cm. Find the length of one side of the triangle.