Step: 1

A straight angle is an angle measuring exactly 180°.

Step: 2

The angle shown by the hands in the clock also measures exactly 180°.

Step: 3

So, the hands of the clock shown make a straight angle.

Correct Answer is : straight angle

Step: 1

An angle which measures 90° is a right angle.

Step: 2

An angle which measures less than 90° is an acute angle.

Step: 3

An angle which measures greater than 90° is an obtuse angle.

Step: 4

From the given figures,Figures 1 and 4 are acute angles. Figure 3 is a right angle. Figure 2 is an obtuse angle.

Correct Answer is : Figure 2

Step: 1

Obtuse angles are those which are greater than 90° .

Step: 2

Angle 1 and angle 3 are greater than 90° .

Step: 3

So, angle 1 and angle 3 are obtuse angles.

Correct Answer is : angle 1 and angle 3

Step: 1

In the figure, angle 1, angle 2, angle 3, and angle 4 are right angles. Angle 6 is less than 90°.

Step: 2

Only angle 5 and angle 7 are more than 90°.

Correct Answer is : angle 5 and angle 7

Step: 1

Compare the given angle with right angle shown in the figure

Step: 2

The angles formed by the clock′s hands when it is 10 O′Clock, is less than a right angle. So, the angle shown is less than a right angle.

Correct Answer is : less than a right angle

Step: 1

A right angle is an angle that measures is 90°.

Step: 2

The angle shown by the hands of the clock measures slightly greater than 90°.

Step: 3

So, the angle formed by the hands of the clock is greater than a right angle.

Correct Answer is : The angle formed is greater than a right angle

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- Angle
- Right Angle