The document explains the concept of angles and their various types, including acute, right, obtuse, and straight angles. An acute angle measures less than 90 degrees, a right angle is exactly 90 degrees, an obtuse angle is between 90 and 180 degrees, and a straight angle measures 180 degrees. Common examples of each type of angle are provided for clarity.

1. ANGLE AND ITS TYPES
A.VICTORIYA WINSE ANGELIN
21EDM05

2. ANGLE
An Angle is the figure formed by two rays,
called the sides of the angle, sharing a
common endpoint, called the vertex of the
angle.

3. ANGLE

4. ACUTE ANGLE
An Angle which is measuring less than 90
degrees is called an acute angle. This angle is
smaller than the right angle.
 For example, ∠30o, ∠45o, ∠60o, ∠75o, ∠33o,
∠55o, ∠85o, etc.

5. EXAMPLES

6. RIGHT ANGLE
When two straight lines intersect each other
at 90˚ or are perpendicular to each other at
the intersection, they form the right angle. A
right angle is represented by the symbol ∟.

7. EXAMPLES

8. OBTUSE ANGLE
An obtuse angle is an angle which is
greater than 90° and less than 180°
Some examples of obtuse angle degrees
are 110°, 135°, 150°, 179°, 91°

9. EXAMPLES

10. STRAIGHT ANGLE
A straight Angle is an angle equal to 180
degrees. It is called straight because it
appears as a straight line.
Example 180 degree

11. EXAMPLES

12. VIDEO RESOURCE