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UNDERSTANDING ELEMENTChe ach one of the following angles as right, straight, acute, obtuse or reflex:5.5 Measuring AnglesThe improvised 'Right-angle tester' we made is helpful to compare angles withright angle. We were able to classify the angles as acute, obtuse or reflex.But this does not give a precise comparison. It cannot find which one amongthe two obtuse angles is greater. So in order to be more precise in comparisonwe need to measure the angles. We can do it with a 'protractor'.The measure of angleWe call our measure, 'degree measure'. One complete revolution is divideinto 360 equal parts. Each part is a degree. We write 360° to say three hundresixty degrees'Think, discuss and writeHow many degrees are there in half a revolution? In one right angle? In |
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Answer» (e). Is right answer (e) is the right answer of this question |
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