What are the 12 types of angles and their degrees?

The 12 Types of Angles and Their Degrees

Angles are geometric shapes formed by two rays that share a common endpoint, known as the vertex. They are classified based on their degree measure, which is the amount of rotation required to move one ray onto the other. Here are the 12 types of angles and their degrees:

1. Zero-Degree Angle (0°): Also known as a straight angle, this angle has no opening, with both rays lying on the same line.

2. Acute Angle (<90°): An angle less than 90 degrees is called an acute angle. It has a sharp point and appears less than a right angle.

3. Right Angle (90°): A right angle is formed when two rays are perpendicular to each other, creating a square corner.

4. Obtuse Angle (>90°): An angle greater than 90 degrees but less than 180 degrees is called an obtuse angle. It has a wide opening and appears greater than a right angle.

5. Straight Angle (180°): A straight angle is formed when two rays lie on opposite sides of a line, creating a straight line.

6. Reflex Angle (>180°): An angle greater than 180 degrees but less than 360 degrees is called a reflex angle. It has a very wide opening and appears to “bend” back on itself.

7. Complete Angle (360°): A complete angle is formed when two rays rotate around the vertex, returning to their original position. It has a full opening, covering the entire circle.

8. Supplementary Angles (180°): Two angles that add up to 180 degrees are called supplementary angles. They are adjacent to each other and form a straight line.

9. Complementary Angles (90°): Two angles that add up to 90 degrees are called complementary angles. They are adjacent to each other and form a right angle.

10. Vertical Angles (180°): Two angles that are formed by two intersecting lines and are opposite each other are called vertical angles. They are always equal in measure, adding up to 180 degrees.

11. Adjacent Angles: Two angles that share a common vertex and one common side are called adjacent angles. Their sum is equal to the measure of the exterior angle formed by extending one of the rays.

12. Consecutive Angles: Two angles that share a common vertex and lie on the same side of a line are called consecutive angles. Their sum is equal to the measure of the straight angle formed by the two rays.