Measuring Angles using a Protractor

What is a protractor?

• A tool used to measure angles in degrees.

• A device for measuring temperature.

• An instrument for measuring time intervals.

• A tool for cutting shapes in paper.

What is the measure of a reflex angle?

• Less than 90 degrees

• More than 180 degrees but less than 360 degrees

• Exactly 180 degrees

• More than 360 degrees

What is the importance of measuring angles accurately?

• It is only important in mathematics classes.

• Accurate angle measurement is important in geometry, construction, and various fields of science and engineering.

• It is not important at all.

• It is only important for artists and designers.

What is a straight angle?

• A straight angle measures exactly 90 degrees.

• A straight angle measures exactly 180 degrees.

• A straight angle measures exactly 360 degrees.

• A straight angle measures exactly 45 degrees.

How do you read a protractor?

• Align the baseline of the angle with the zero line of the protractor and read the degree measurement where the other side of the angle intersects the numbered scale.

• Hold the protractor upside down and read the measurement from the bottom.

• Use the protractor to measure the length of the angle's sides instead of the degree.

• Estimate the angle by comparing it to a known angle like 90 degrees.

If an angle measures 120 degrees, what type of angle is it?

• Acute angle

• Right angle

• Obtuse angle

• Straight angle

What is the sum of angles in a triangle?

• 90 degrees

• 180 degrees

• 360 degrees

• 120 degrees

How can you check if your angle measurement is correct?

• By using a different protractor or verifying the angle with known angle measurements.

• By measuring the angle multiple times and averaging the results.

• By estimating the angle visually without any tools.

• By comparing it with a straight edge.

What is the measure of an obtuse angle?

• Less than 90 degrees

• Exactly 90 degrees

• More than 90 degrees but less than 180 degrees

• More than 180 degrees

What is the measure of an acute angle?

• Less than 90 degrees

• Exactly 90 degrees

• More than 90 degrees

• Exactly 45 degrees