Classifying and Measuring Angles

This video tutorial introduces the concept of measuring angles, focusing on using a protractor. It begins with a recap of angle types, such as right, acute, and obtuse angles. The tutorial then explains how to use a protractor to measure angles, providing detailed steps and examples. Several example problems are solved to demonstrate the process of naming, measuring, and classifying angles. The video concludes with a summary and encourages viewers to practice measuring angles on their own.

What is the main focus of this lesson?

• Calculating area

• Measuring angles

• Finding perimeter

• Identifying shapes

Which instrument is used to measure angles?

• Ruler

• Compass

• Protractor

• Scale

What is the vertex of an angle?

• The longest side of a triangle

• The center of a circle

• The point where two rays meet

• The midpoint of a line

How is angle HIJ classified if it measures 105 degrees?

• Obtuse

• Right

• Straight

• Acute

What is the measure of angle JKL if it is obtuse?

• 130 degrees

• 90 degrees

• 50 degrees

• 180 degrees

If angle PQR is 15 degrees, how is it classified?

• Acute

• Right

• Reflex

• Obtuse

What is the measure of a right angle?

• 45 degrees

• 90 degrees

• 135 degrees

• 180 degrees

If angle ABC measures 160 degrees, what type of angle is it?

• Acute

• Right

• Obtuse

• Straight

What is the measure of angle DEF if it is obtuse?

• 35 degrees

• 90 degrees

• 145 degrees

• 180 degrees