Protractor Angles

How do you measure an angle using a protractor?

• Align the baseline of the protractor with one side of the angle, then read the degree measurement where the other side intersects the protractor.

• Place the protractor on the angle and draw a line to mark the measurement.

• Use a ruler to measure the length of the angle's sides and calculate the angle using trigonometry.

• Estimate the angle by comparing it to a known angle, such as 90 degrees.

What is an obtuse angle?

• An angle that measures exactly 90°.

• An angle that measures less than 90°.

• An angle that measures more than 90° but less than 180°.

• An angle that measures exactly 180°.

Why is it important to measure angles accurately?

• It is essential for accurate navigation and mapping.

• It helps in determining the color of objects.

• It is crucial for maintaining the structural integrity in construction.

• It allows for faster calculations in basic arithmetic.

What is a protractor?

• A tool used to measure angles in degrees.

• A device for drawing straight lines.

• A type of ruler used for measuring length.

• A tool for cutting paper accurately.

What is a straight angle?

• An angle that measures exactly 90°.

• An angle that measures exactly 180°.

• An angle that measures less than 90°.

• An angle that measures more than 180°.

What is the measure of a 135° angle rounded to the nearest 5 degrees?

• 130°

• 135°

• 140°

• 125°

How do you round an angle to the nearest 5 degrees?

• Look at the last digit of the angle measurement. If it's 3 or more, round up; if it's less than 3, round down.

• Always round down regardless of the last digit.

• Round up if the last digit is 5 or more, otherwise round down.

• Round to the nearest 10 degrees instead of 5 degrees.

What is the measure of a 95° angle rounded to the nearest 5 degrees?

• 90°

• 95°

• 100°

• 85°

What is the measure of a 105° angle rounded to the nearest 5 degrees?

• 100°

• 105°

• 110°

• 95°

What is the range of degrees that a protractor can measure?

• 0° to 90°

• 0° to 180°

• 0° to 360°

• 90° to 180°