Question 2 (e)

Classify each one of the following angles as right, straight, acute, obtuse or reflex:

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Solution

An angle whose sides lie in opposite directions from the vertex in the same straight line and which equals two right angles is called straight angle. Its measure is $180^{\circ}$ .

Since the given angle is equal to $180^{\circ}$ , hence it is a straight angle.

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Question 11
If the sum of two angles is greater than $180^{\circ}$ , then which of the following is not possible for the two angles?
a) One obtuse angle and one acute angle
b) One reflex angle and one acute angle
c) Two obtuse angles
d) Two right angles

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Right, Straight and Complete Angles

Standard VI Mathematics

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Question 2 (e) Classify each one of the following angles as right, straight, acute, obtuse or reflex:

An angle whose sides lie in opposite directions from the vertex in the same straight line and which equals two right angles is called straight angle. Its measure is 180∘. Since the given angle is equal to 180∘, hence it is a straight angle.

Question 2 (e)

Classify each one of the following angles as right, straight, acute, obtuse or reflex:

An angle whose sides lie in opposite directions from the vertex in the same straight line and which equals two right angles is called straight angle. Its measure is $180^{\circ}$ .

Since the given angle is equal to $180^{\circ}$ , hence it is a straight angle.