Learn what an equilateral triangle is, how to identify its shape, angles, area, perimeter and height. Find out the comparison, theorem and examples of equilateral triangles with other types of triangles. What is an equilateral triangle in geometry – its definition, properties, picture, and types along with formulas for area and perimeter Properties An equilateral triangle is a triangle that has three equal sides. It is a special case of an isosceles triangle in the modern definition, stating that an isosceles triangle is defined at least as having two equal sides. [1] The equilateral triangle , also called a regular triangle, is a triangle with all three sides equal. What are the other important properties of that specific regular shape? All three internal angles are congruent to each other, and all of them are equal to 60°.
