Q4 of 45 Page 97

Measure the angles given below, using the Protractor and write down the measure.


(a) 45°


(b) 120°


(c) 90°


(d) 60°, 130° and 90°.


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2

Say True or False:

(a) The measure of an acute angle < 90°.

(b) The measure of an obtuse angle < 90°.

(c) The measure of a reflex angle > 180°.

(d) The measure of one complete revolution = 360°

(e) If m∠A = 53° and m∠B = 35°, then m∠A > m∠B.

 3

Write down the measures of

(a) some acute angles.


(b) some obtuse angles.


(Give two examples of each).

 5

Which angle has a large measure? First estimate and then measure.

Measure of ∠A =


Measure of ∠B =


 6

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