Classifying Polygons by Perpendicular Sides

This video tutorial teaches how to classify polygons by observing perpendicular lines. It begins with an introduction to polygons and non-polygons, followed by an explanation of perpendicular lines and right angles. The tutorial then demonstrates how to classify polygons based on the number of perpendicular sides they have, using examples like pentagons, triangles, rectangles, and squares. Finally, it provides practical applications by identifying perpendicular sides in everyday objects.

What defines a polygon?

• A closed plane figure made up of line segments

• A figure with disconnected lines

• A figure with curved lines

• A figure with only one line segment

Which shape has no pairs of perpendicular sides?

• Rectangle

• Rhombus

• Right triangle

• Square

How many pairs of perpendicular sides does a rectangle have?

• Four pairs

• One pair

• Two pairs

• Three pairs

If a wooden piece forms only one right angle, how many pairs of perpendicular sides does it have?

• None

• Four pairs

• Two pairs

• One pair

How many pairs of perpendicular sides are there in a textbook with four right angles?

• One pair

• Two pairs

• Three pairs

• Four pairs