Understanding Angles | Definitions and Measurements for Degrees in Mathematics

130 degrees

In mathematics, degrees are a unit for measuring angles

In mathematics, degrees are a unit for measuring angles. A degree is equal to 1/360th of a complete revolution or circle.

When you mention “130 degrees,” you are referring to an angle that measures 130 units out of 360 units of a complete circle. This angle would be classified as an obtuse angle since it is greater than 90 degrees but less than 180 degrees.

To better understand angles, let’s dive into some key definitions:
1. Acute Angle: An acute angle is an angle that measures less than 90 degrees. It is “sharp” or “narrow” in nature.
2. Right Angle: A right angle measures exactly 90 degrees and forms a perfect “L” shape.
3. Obtuse Angle: An obtuse angle is an angle that measures greater than 90 degrees but less than 180 degrees. It is wider or more “open” than a right angle.
4. Straight Angle: A straight angle measures exactly 180 degrees and forms a straight line. It is like a “half-turn.”
5. Reflex Angle: A reflex angle is an angle greater than 180 degrees but less than 360 degrees. It forms more than a complete turn but less than two full turns.
6. Complementary Angles: Two angles are called complementary when their sum is exactly 90 degrees. For example, if one angle measures 45 degrees, the other angle should measure 45 degrees as well to make a complementary pair.
7. Supplementary Angles: Two angles are called supplementary when their sum is exactly 180 degrees. For example, if one angle measures 130 degrees, the other angle should measure 50 degrees to make a supplementary pair.

I hope this explanation provides you with a better understanding of angles and their measurements. If you have any additional questions or need further clarification, please feel free to ask!

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