Understanding Angles and Their Measures

This video tutorial covers the classification of angles, including right, acute, and obtuse angles. It explains the concept of degrees as a unit of measurement for angles, with a circle divided into 360 degrees. The tutorial provides examples and exercises for classifying angles and measuring them in degrees and as fractions of a turn. Students are encouraged to practice classifying angles and measuring them, with instructions to bring their work to class for review.

How many degrees are there in a full circle?

• 360

• 270

• 180

• 90

What is the unit used to measure angles?

• Radians

• Inches

• Meters

• Degrees

What fraction of a circle is 90 degrees?

• 1/6

• 1/3

• 1/2

• 1/4

What is a right angle?

• An angle equal to 180°

• An angle equal to 90°

• An angle less than 90°

• An angle more than 90°

What symbol is used to indicate a right angle?

• A circle

• A triangle

• A square

• A line

Which of the following is a characteristic of a right angle?

• It measures 180°

• It measures more than 180°

• It measures 90°

• It measures less than 90°

What is an acute angle?

• An angle equal to 180°

• An angle less than 90°

• An angle equal to 90°

• An angle more than 90°

Which of the following angles is considered acute?

• 45°

• 90°

• 120°

• 180°

An acute angle is less than which degree?

• 90°

• 180°

• 270°

• 360°

What is an obtuse angle?

• An angle less than 90°

• An angle equal to 90°

• An angle more than 90° but less than 180°

• An angle equal to 180°