Q8 of 45 Page 97

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


By measuring the figures with the help of protractor we get that the angles are of 40° for the first figure, 130° in the second figure, 65° in the third and 135° in the fourth one.


More from this chapter

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6

From the following two angles, which has longer measure? Estimate and then confirm by measuring them.

 7

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 ……….. .

 9

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

 10

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?