- Angles are formed when two rays meet. If there are two straight lines such that they have a common end point, then the amount of curl between these two lines is known as 'angle'.
- There are angles in most shapes and in many of the objects you see and use on a daily basis.
- Angles are measured in degrees.
- There are four types of angles:
- Acute angle
- Obtuse angle
- Right angle
- Straight angle
When two straight lines make an angle with each other such that it is greater than 0° and less than 90°, then these lines are said to be making an acute angle with each other.
- Acute angles are less than 90°.
- Some triangles have acute angles.
- Here are few examples: The slice of pizza that you eat for lunch is an acute angle.
- You get a new box of pencils for school. After you sharpen all of the pencils you notice that the tips are acute angles.
- When two line segments point exactly in the opposite direction and form a single straight line, then the angle they form is 180° or straight angle.