Measuring Angles and Reflex Angles

This video tutorial explains how to measure different types of angles using a protractor. It covers the measurement of acute, obtuse, and reflex angles, providing step-by-step instructions for each. The tutorial also discusses alternative methods for measuring reflex angles, including using a ruler and subtracting from 360 degrees.

What tool is essential for measuring angles in this video?

• Calculator

• Ruler

• Compass

• Protractor

When measuring an acute angle, where should the zero line of the protractor be placed?

• Along the arc

• At the center of the protractor

• On the opposite side of the angle

• Along the angle line

What is the degree range for an obtuse angle?

• 0 to 90 degrees

• 90 to 180 degrees

• 180 to 270 degrees

• 270 to 360 degrees

How do you know when you've measured past a right angle?

• When the protractor reads 180 degrees

• When the protractor reads 135 degrees

• When the protractor reads 90 degrees

• When the protractor reads 45 degrees

What is the first step in measuring a reflex angle using a ruler?

• Extend the line segment

• Subtract from 360 degrees

• Use a compass

• Measure the acute angle

What is the total degree measure of a reflex angle if the acute angle is 44 degrees?

• 44 degrees

• 180 degrees

• 316 degrees

• 360 degrees

What is the alternative method to find the size of a reflex angle?

• Add 180 degrees

• Subtract the acute angle from 360 degrees

• Use a compass

• Measure directly with a protractor

What is the degree measure of a reflex angle if the acute angle is 50 degrees?

• 320 degrees

• 316 degrees

• 310 degrees

• 360 degrees

Which angle is larger than 180 degrees but less than 360 degrees?

• Reflex angle

• Right angle

• Obtuse angle

• Acute angle

What is the degree measure of an angle that is 180 degrees plus 136 degrees?

• 180 degrees

• 360 degrees

• 316 degrees

• 136 degrees