Measuring Angles with a Protractor

The video tutorial introduces the concept of angles and their measurement using a protractor. It explains how to use a protractor to measure angles in degrees, providing examples of measuring angles of 30°, 135°, and 225°. The tutorial also covers measuring angles greater than 180° by adding measurements. The session concludes with a transition to exercises, ensuring the learner understands the process.

What is the main topic of today's lesson?

• Angles

• Fractions

• Algebra

• Geometry

What tool is used to measure angles?

• Ruler

• Protractor

• Calculator

• Compass

What is the unit of measurement for angles?

• Degrees

• Meters

• Liters

• Kilograms

Where should the midpoint of the protractor be placed when measuring an angle?

• On the base of the angle

• On the vertex of the angle

• On the side of the angle

• On the top of the angle

What is the first step in measuring a 30° angle?

• Place the midpoint on the vertex

• Read the number on the protractor

• Draw a line

• Align the protractor with the base

What number does the protractor show for a 30° angle?

• 60

• 30

• 90

• 45

How do you align the protractor when measuring a 135° angle?

• With the zero line

• With the 90° line

• With the 180° line

• With the 45° line

What is the protractor reading for a 135° angle?

• 135

• 90

• 180

• 45

What should you do if an angle is more than 180°?

• Use a different tool

• Ignore the angle

• Turn the protractor

• Estimate the angle

How do you calculate a 225° angle using a protractor?

• Subtract 135° from 360°

• Add 180° to 45°

• Subtract 45° from 270°

• Add 90° to 135°