Several types of triangles exist, including scalene, isosceles, equilateral, right, obtuse and acute. Triangles are categorized according to their sides, angles or a combination of both. More »

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An isosceles triangle is a specific type of triangle where only two of the side lengths and two of the internal angles are equal. There are also other types of triangles like equilateral triangles and scalene triangles. More »

A triangle can have two acute angles. Some examples of triangle types that have two acute angles are a right triangle and an isosceles right triangle. More »

An isosceles triangle is a specific type of triangle where only two of the side lengths and two of the internal angles are equal. There are also other types of triangles like equilateral triangles and scalene triangles. More »

The main kinds of triangles are: equilateral, isosceles, scalene, acute, right and obtuse. These names can be combined to further describe the type of triangle. More »

An isosceles trapezoid contains a single line of symmetry. A trapezoid is referred to as an isosceles trapezoid when its two non-parallel edges are equal in length. More »

The perimeter of a triangle is the sum of all the sides of the triangle, and you determine the perimeter of any triangle by adding the lengths of all three sides. Since an isosceles triangle has two sides of equal length... More »