Types and Properties of Angles

The video tutorial introduces angles, explaining how they are measured and categorized by size: acute, right, obtuse, and reflex angles. It also discusses how angles can be described by their position as interior or exterior. The tutorial concludes with a summary and directs viewers to additional resources for further learning.

What instrument is used to measure angles?

• Telescope

• Protractor

• Compass

• Ruler

What is the term for angles less than 90 degrees?

• Obtuse angles

• Right angles

• Acute angles

• Reflex angles

Which angle is exactly 90 degrees?

• Reflex angle

• Obtuse angle

• Right angle

• Acute angle

What is the range of degrees for obtuse angles?

• Less than 90°

• Exactly 90°

• 91° to 180°

• Greater than 180°

How many degrees are there in a full circle?

• 270°

• 90°

• 180°

• 360°

What is the range of degrees for reflex angles?

• Less than 90°

• 91° to 180°

• Greater than 180° but less than 360°

• Exactly 360°

What do we call angles inside a shape?

• Interior angles

• Exterior angles

• Acute angles

• Reflex angles

What do we call angles outside a shape?

• Right angles

• Exterior angles

• Obtuse angles

• Interior angles

In the absence of a shape, what is the smaller angle called?

• External angle

• Right angle

• Internal angle

• Reflex angle

In the absence of a shape, what is the larger angle called?

• Internal angle

• External angle

• Acute angle

• Obtuse angle