Types and Properties of Angles

This lesson explores different types of angles, starting with an introduction to angles as a measure of turn. It covers acute angles (0-90 degrees), right angles (90 degrees), obtuse angles (90-180 degrees), straight angles (180 degrees), reflex angles (180-360 degrees), and concludes with a full circle at 360 degrees.

What is the primary purpose of angles?

• To measure distance

• To measure speed

• To measure weight

• To measure the amount of turn

What is the range of an acute angle?

• 0 to 45 degrees

• 180 to 360 degrees

• 0 to 90 degrees

• 90 to 180 degrees

Which of the following is an example of an acute angle?

• 120 degrees

• 90 degrees

• 180 degrees

• 45 degrees

What is the measure of a right angle?

• 180 degrees

• 360 degrees

• 90 degrees

• 45 degrees

Which angle is exactly 90 degrees?

• Right angle

• Acute angle

• Reflex angle

• Obtuse angle

What is the range of an obtuse angle?

• 270 to 360 degrees

• 0 to 90 degrees

• 180 to 270 degrees

• 90 to 180 degrees

Which of the following is an example of an obtuse angle?

• 360 degrees

• 120 degrees

• 60 degrees

• 30 degrees

What is the measure of a straight angle?

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

Which angle is exactly 180 degrees?

• Acute angle

• Right angle

• Reflex angle

• Straight angle

What is the range of a reflex angle?

• 180 to 360 degrees

• 90 to 180 degrees

• 0 to 90 degrees

• 360 to 450 degrees