Test : Angles And Their Measurement - 1 - Class 5 MCQ

This angle is more than 90 degree and so, its an obtuse angle.

an obtuse angle is an angle which is between 90 and 180 degree.

Danish drew an angle of 40°.

• Manish's angle is twice the measure of Danish's angle.
• Calculate Manish's angle: 40° x 2 = 80°.

Thus, the measure of Manish's angle is 80°.

• The angle shown in the diagram is an acute angle, as it is less than 90 degrees.
• All the other options given are more than 90 degrees
• The approximate measure of this angle is 45 degrees.

The number of degrees in one right angle is 90^o. Therefore, the number of degrees in three right angles would be:

3×90^o=270^o

So, the correct answer is:

4) 270°

An angle that measures more than 0° but less than 90° is known as an acute angle.

• Acute angles are smaller than right angles, which measure exactly 90°.
• These angles are found in many geometric shapes and figures.
• Understanding acute angles is essential in geometry.

An angle that measures 180^o but > 90^o is called an obtuse angle.
Here it is given 140^o, so it is an obtuse angle.

As evident from the picture in question and comparing with the above picture, we can come to the conclusion that the angle depicted in qn is more than a right angle.

The angle represented by ∠x is reflex. Here’s why:

• A reflex angle is an angle greater than 180 degrees but less than 360 degrees.
• On a clock face, when the hands form a reflex angle, they create a large gap between them.
• The image of the clock suggests the angle is indeed larger than 180 degrees.