May 12, 2013 · Learn about the special relationship between the sides and angles of a right triangle, and how to calculate the angles of a right triangle.

A right triangle must have three sides and must be a closed shape. One of the angles must be a 90-degree angle which is where the triangle gets its name since a 90-degree angle is a right angle.

The definition of a right triangle is a triangle in which one of the interior angles measures 90 degrees. This 90-degree interior angle is also referred to as a right angle.

Learn how to use right triangles to find the slope of line, and see examples that walk through sample problems step-by-step for you to improve your math knowledge and skills.

Learn how to solve a right triangle, and see examples that walk through sample problems step-by-step for you to improve your math knowledge and skills.

Let's take a look at two diagrams of right angle triangles and identify the opposite, adjacent and hypotenuse sides from the diagram with the help of the steps explained above.

A 45-45-90 triangle is named for the degrees of the three inner angles of the triangle. Since two of the angles are smaller than the third, the 45-45-90 triangle is considered an isosceles triangle.

One type of triangle is a right triangle; that is, a triangle with one right (90 degree) angle. The right angle is usually marked with a small square in that corner, as shown in the image.

Learn how to use trigonometric ratios to solve for an angle of a right triangle, and see examples that walk through sample problems step-by-step for you to improve your math knowledge and skills.

Learn how to identify right triangles from coordinates, and see examples that walk through sample problems step-by-step for you to improve your math knowledge and skills.