Question

7. What is the measure of (1) a right angle and (ii) a straight angle? (iii) How many right angles make a straight angle? & Identify the (1) acute angles, (ii) obtuse angles and (iii) reflex angles among the following.​

Answer 1

Answer:

1) Angle which is 90° is called right angle.

ii) Angle which is 180° is called straight angle.

iii) you would need to two right angles to make a straight angle because 90 × 90 = 180

1) A angle which measures less than 90° is called acute angle.

ii) A angle which measures more than 90° is called obtuse angle.

iii) A angle which measures more than 180° is called reflex angle.

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Answer 2

QUESTION:

• What is the measure of (1) a right angle and (ii) a straight angle? (iii) How many right angles make a straight angle? & Identify the (1) acute angles, (ii) obtuse angles and (iii) reflex angles among the following.

ANSWERS:

• The measure of a Right Angle and Straight Angle is 90 degrees and 180 degrees respectively.

• Two right angles make a straight angle, and two straight angles make a full angle.

• Acute angles measure less than 90 degrees. Right angles measure 90 degrees. Obtuse angles measure more than 90 degrees.

• An obtuse angle is an angle that measures more than 90 degrees and less than 180 degrees.

• A reflex angle is any angle that is more than 180 degrees (half circle) and less than 360 degrees (full circle). A reflex angle will always have either an obtuse or an acute angle on the other side of it. It can be one of the more confusing angles to find because it's on the 'outside' of the angle.

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