How many perpendicular lines are there in the capital letter ' $E$ '?
 

In the figure, line segments AB and CD do not intersect each other. Can you say that they are parallel? Give reasons.

Using the inner (anti-clockwise) scale of the protractor (shown in Fig.), the measure of $\angle b$ is

Using the outer (clockwise) scale of the protractor (shown in figure), measure of $\angle f$ is

 Find the angle between the hands of a clock at  $7$ o'clock

There are markings as shown on a domestic appliance. Through how many degrees does the pointer turn when it moves.

clockwise from off to cold.