This document defines and describes the different types of angles in geometry. It states that an angle is formed by two rays sharing a common endpoint called the vertex. The types of angles are defined as: zero angle, acute angle measuring less than 90 degrees; right angle measuring exactly 90 degrees; obtuse angle measuring between 90 and 180 degrees; straight angle measuring 180 degrees; reflex angle measuring between 180 and 360 degrees; and complete angle measuring 360 degrees. Examples and illustrations are provided for each angle type.

1. Std 6 Ch 2 Angles
Manjiri Sawant
48

2. Objective
1) What is angle?
(a) Rays or
(b)Vertix
2) Types of angles?
ZERO ANGLE, ACUTE ANGLE, RIGHT ANGLE,
OBTUSE ANGLE ,STRAIGHT ANGLE , REFLEX ANGLE, COMPLETE
ANGLE

3. What is Angle?
In geometry, 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.
This angle can be named as ∠ AOB or ∠BOA

5. Types of Angles
1. ZERO ANGLE
2. ACUTE ANGLE
3. RIGHT ANGLE
4. OBTUSE ANGLE
5. STRAIGHT ANGLE
6. REFLEX ANGLE
7. COMPLETE ANGLE

6. ZERO ANGLE
An angle with a
measure of zero
degree 0° is called a
zero angle.

7. ACUTE ANGLE
Acute Angle: an
angle whose
measure is less
than 90°

8. RIGHT ANGLE
Right Angle: an
angle whose
measure is
exactly 90 °.

9. OBTUSE ANGLE
Obtuse Angle: an
angle whose
measure is between
90 ° and 180°

10. STRAIGHT ANGLE
Straight Angle: an
angle that is exactly
180 °

11. REFLEX ANGLE
Reflex angle is more than
180° but less than
360° is called a Reflex
angle.

12. COMPLETE ANGLE / FULL ANGLE
Complete angle is 360°
is called a complete
angle.

13. HOME WORK

14. Thank you