An angle is defined as the union of two rays with a common endpoint.The common end point is known as the vertex of the angle while the rays are known as the sides of the angle.
Further Explanation:
A ray
- It is a part of a line with one end point and proceeds on in one direction.
An angle
- An angle is defined as the union of two rays with a common endpoint.
Angles can be named in three different ways;
- Using three Capital letters such as ∠ PQR, or ∠BCD. The middle letter represents the vertex of the angle. Therefore, the angles above are read as "angle PQR" and angle BCD.
- Using the Vertex of the angle. For example, in the case of ∠PQR, can also be called angle Q, while ∠BCD can be called angle C.
- Angles can also be named by placing any number or symbol at the vertex in the interior of the angle. Such that angles can be called angle 1 or angle 3 , or angle 5, and so on.
Angles are measured using a tool known as a protractor
How to measure the angle using a protractor
- To measure the angle, the mid-point of a protractor is placed on the vertex of the angle.
- Then lining up one side of the angle with the zero line of the protractor.
- Then read the degrees where the other side crosses the number scale.
Keywords: Rays, angles, properties of angles, measurement of angles
Learn more about;
- Angles: brainly.com/question/1745042
- Rays: brainly.com/question/1745042
- Units used to measure angles: brainly.com/question/8812311
- Methods of naming angles: https://brainly.com/question/1594009
- Measuring angles: https://brainly.com/question/1594009
Level: Middle school
Subject: Geometry
Topic: Angles
