Angles Mathematics Types of Angles

Class: Pry 4

Subject: Mathematics

Topic:Angles

Content:

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.

Types of angles

1. Acute Angle:

An angle whose measure is less than 90° is

called an acute angle .

2. Right Angle:

An angle whose measure is 90° is called right

angle .

3. Obtuse Angle:

An angle whose measure is greater than 90° but

less than 180° is called an obtuse

angle .

4. Straight Angle:

An angle whose measure is 180° is called a

 straight

angle .

A straight angle is equal to two right angles.

5. Reflex Angle:

An angle whose measure is more than 180° but

less than 360° is called a reflex angle.

6.Full angle or angle at a point:This is an angle equal to 360 degree exactly.

Evaluation

1.What is an angle?

2.Explain the following types of angles

i.Acute angle ii.right angle iii.Obtuse angle. iv.straight angle v.reflex angle vi.full angle.