How to construct an angle using protractor?
Let us construct an angle <PQR= 110o
Step 1. First draw the ray QR
Step 2. Place the protractor on ray QR, where center point on Q and base line along QR.
Step 3. Look at the scale. 0 shows in inner scale, so mark 110o on inner scale
Step 4.
Draw Ray QP
Construct the following angles using protractor
m<MNO = 65o
m<DEF = 80o
What are the types of angles?
Acute angle
An angle which is less than 90 is called an acute angle
Obtuse angle
An angle which is more than 90o and less than 180o are called obtuse angle
Right angle
An angle which is equal to 90o are called right angle
Straight angle
An angle which measures 180 is called straight angle. Opposite rays forms Straight angle
Reflex angle,
An angle which is more than 180o and less than 360o is called reflex angle.
0o degree angle or complete angle 360o
