Some Helpful Tools
Math: Triangles - Tutorial
Types of Triangles
A triangle is a plane figure with three straight sides and three angles.
Triangles come in all shapes and sizes.
Similar triangles have the same shape, but they have different sizes. Similar
triangles have corresponding angles that are equal and sides that are in proportion.
Remember, being proportion means that the two ratios are equal to show how they relate to one another.
This section will cover the different types of triangles and how to measure them.
Equilateral Triangle
An equilateral triangle has three equal side and three equal angles.
Isosceles Triangle
An isosceles triangle has two equal sides and two equal angles.
Scalene Triangle
None of the sides or angles are equal.
Determine the Measure of a Triangle
Triangles with Corresponding Angles
