## Opposite angles are equal

### In geometry, opposite angles refer to a pair of angles that are formed when two lines intersect

In geometry, opposite angles refer to a pair of angles that are formed when two lines intersect. When two lines intersect, they create four angles, and opposite angles are always opposite each other (across from each other).

The key property of opposite angles is that they are equal in measure. This means that if you have two intersecting lines and you measure one of the opposite angles, the other opposite angle will have the same measurement.

To illustrate this concept, let’s consider two intersecting lines, line AB and line CD, as shown below:

A————-B

| |

| |

| |

C————-D

In this diagram, angles ACE and BCD are opposite angles. If we measure angle ACE, let’s say it measures 40 degrees, then according to the property of opposite angles, angle BCD will also measure 40 degrees. This relationship holds true for any pair of opposite angles in any intersecting lines.

Opposite angles being equal is an important concept in geometry, especially when dealing with the properties of parallel lines and transversals, as it helps in identifying congruent angles and proving certain theorems related to angles.

##### More Answers:

The Importance of Right Angles in Geometry | Understanding the Concept of 90 Degree AnglesUnderstanding Opposite Sides in Geometric Figures | Parallelism and Equality

A Comprehensive Guide to Diagonals in Quadrilaterals | Intersection, Division, and Right Angles Explained