Alternate interior angles are the angles formed when a transversal intersects two parallel or non-parallel lines. These angles are located on the inside of the parallel lines but on opposite sides of the transversal. The transversal crosses through the two lines,...

Before we start with the corresponding angles directly, we have to do a brief review of the angles, the parallel and non-parallel lines, and the transverse lines. In geometry, an angle is made up of three parts: a vertex and two sides or segments. The vertex of an...

Complementary angles are defined with respect to the sum of two angles. We have a pair of complementary angles when the sum of the two angles equals 90 degrees. In other words, if the two angles add up to form a right angle, these angles are referred to as...

Supplementary angles are a pair of angles, which when added measure 180 degrees. For example, the angles 140° and 40° are supplementary since adding them together we get 180 degrees. When we join two supplementary angles, we form a straight line. Here, we will look at...

A circle is a curve in the plane that consists of all points that have the same distance from a fixed point, called the center. The common distance of the points from the center is called the radius. The region covered by the circle is called the area of the circle...