## Opposite Angles by the Vertex – Definition and Examples

When two lines intersect each other, then the opposite angles, formed due to the intersection, are called vertical angles or … Read more

## Alternate Exterior Angles – Definition and Examples

Alternate exterior angles are a pair of angles formed on the outside of two lines that are crossed by a … Read more

## Alternate Interior Angles – Definition and Examples

Alternate interior angles are the angles formed when a transversal intersects two parallel or non-parallel lines. These angles are located … Read more

## Corresponding Angles – Definition and Examples

Before we start with the corresponding angles directly, we have to do a brief review of the angles, the parallel … Read more

## Complementary Angles- Definitions and Examples

Complementary angles are defined with respect to the sum of two angles. We have a pair of complementary angles when … Read more

## Supplementary Angles- Definition and Examples

Supplementary angles are a pair of angles, which when added measure 180 degrees. For example, the angles 140° and 40° … Read more

## Parts of a Circle with Diagrams

A circle is a curve in the plane that consists of all points that have the same distance from a … Read more

## Radius of a Circle – Formulas and Examples

The radius of a circle is equal to the distance from the center of the circle to any point on … Read more

## Circumference of a Circle – Formulas and Examples

The circumference of a circle defines the length of the contour of the circle. The circumference is also referred to … Read more

## Area of a Circle – Formulas and Examples

The area of a circle is the region occupied by the circle in the two-dimensional plane. We can easily determine … Read more