Properties and Names of Polygons

The video tutorial introduces the basics of polygons, including their definition, properties, and types. It explains the difference between convex and concave polygons, and discusses interior and exterior angles. The lesson includes an activity to sort shapes into polygons and non-polygons. Different types of polygons are named based on the number of sides, and the video concludes with a drill to reinforce learning.

What is the main focus of the lesson in this video?

• Advanced calculus

• Basics of polygons

• Introduction to algebra

• History of mathematics

Which of the following is a characteristic of a polygon?

• It is a three-dimensional shape

• It is made of curved lines

• It is made of straight lines and is closed

• It is an open shape

Which of the following is NOT a polygon?

• Hexagon

• Pentagon

• Circle

• Triangle

What does the Greek word 'poly' mean?

• Line

• Many

• Few

• Angle

How is a convex polygon different from a concave polygon?

• A convex polygon has no angles pointing inwards

• A concave polygon has no angles pointing inwards

• A concave polygon is always regular

• A convex polygon has angles pointing inwards

What is an interior angle?

• An angle outside a polygon

• An angle that is always 90 degrees

• An angle that is neither inside nor outside

• An angle inside a polygon

What is the term for an angle that is both supplementary and adjacent to an interior angle?

• Supplementary angle

• Exterior angle

• Adjacent angle

• Interior angle

What is a diagonal in a polygon?

• A line joining consecutive vertices

• A line joining non-consecutive vertices

• A line that is perpendicular to one side

• A line that is parallel to one side

What is the term for a line segment joining two non-consecutive vertices?

• Angle

• Vertex

• Diagonal

• Side

What is the term for a line segment joining two consecutive vertices?

• Angle

• Vertex

• Side

• Diagonal