a)An angle whose measure is 180° is called a________ angle
b)2/3 of a right angle is ________ degrees
c) Half of a straight angle is an _________ angle
d)An angle whose measure is greater than________ degree and less than________degree is a reflex angle
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Answer:
An angle that measures exactly 180 degrees is called a 'straight angle.
2/3 of a right angle is 60°
= 90/3. = 30°.
The half of a straight angle is a right angle. Since, a straight angle is 180 degrees, the half of it will be 90 degrees which is a right angle.
A 180° angle is called a straight angle. Angles such as 270 degrees which are more than 180 but less than 360 degrees are called reflex angles. A 360° angle is called a complete angle.
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4
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straight angle
60
right angle
180
360
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