Construct angle ${60}^{\circ }$ using protractor and a ruler.

Construct angle ${90}^{\circ }$ using protractor and a ruler.

Draw angle ${180}^{°}$ using protractor.

Draw angle ${20}^{°}$ using protractor.

Draw angle ${220}^{°}$ using protractor.

Two rays forming an angle are called its_____ .

Angle with a measure ${45}^{°}$ is an _____ angle.

In given figure , $\angle 1$ and $\angle 2$ are _____ angles.

In given figure, $\angle AOB$ is _____ (greater / smaller) than $\angle BOC$.