Find the angle measure between the hands of the clock in each figure:

Fill in the blanks with acute, obtuse, right or straight :

(a) An angle whose measure is less than that of a right angle is ………. .

(b) An angle whose measure is greater than that of a right angle is ………… .

(c) An angle whose measure is the sum of the measure of two right angle is ….. .

(d) When the sum of the measures of two angles is that of a right angle, then each one of them is ………… .

(e) When the sum of the measures of two angles is that of a straight angle and if one of them is acute, then the other should be ……….. .

Find the measure of the angle shown in each figure. (First estimate with your eyes and then find the actual measure with a protractor.).

Investigate:

In the given figure, the angle measures 30°. Look at the same figure through a magnifying glass.

Does the angle become larger? Does the size of the angle change?

Measure and classify each angle: