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Class 6 Angles and Their Types — practice questions with answers

Geometry · 5 sample questions from the school syllabus. Try each one, then open the answer and the worked solution.

1. An angle that measures exactly 90 deg is called a:
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Answer: B) Right angle
An angle of exactly 90 deg is a right angle.
2. What type of angle is 210 deg?
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Answer: C) Reflex
210 deg is between 180 deg and 360 deg, so it is a reflex angle.
3. Which type of angle does a quarter turn make?
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Answer: B) Right angle
A quarter turn is 360 deg / 4 = 90 deg, a right angle.
4. In a small game, Kavya lists these angles: 10 deg, 90 deg, 95 deg, 180 deg, 200 deg.
How many of them are obtuse angles?
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Answer: A) 1
Obtuse means more than 90 deg and less than 180 deg. Only 95 deg fits (90 deg is right, 180 deg is straight, 200 deg is reflex, 10 deg is acute). So 1 obtuse angle.
5. Manish lists every whole-number angle measure from 1 deg up to 359 deg.
For how many of these whole-number measures is the angle an OBTUSE angle (greater than 90 deg and less than 180 deg)?
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Answer: C) 89
Obtuse whole-number measures run from 91 deg to 179 deg. Count = 179 - 91 + 1 = 89.
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