Measuring Angles using a Protractor

Front

What is a protractor?

Back

A protractor is a tool used to measure angles in degrees.

Front

How do you read a protractor?

Back

To read a protractor, align the baseline of the angle with the zero line of the protractor and look at where the other line of the angle intersects the numbered scale.

Front

What is the range of angles a protractor can measure?

Back

A protractor can measure angles from 0° to 180°.

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

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

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90° but less than 180°.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180°.

Front

How do you find the measure of an angle using a protractor?

Back

To find the measure of an angle, place the protractor's center point at the vertex of the angle and read the measurement where the other side of the angle intersects the scale.

Front

What is the importance of measuring angles accurately?

Back

Accurate angle measurement is important in construction, engineering, and various fields of science to ensure proper alignment and functionality.

Front

What is the difference between the inner and outer scale of a protractor?

Back

The inner scale is used for measuring angles that open to the right, while the outer scale is used for angles that open to the left.