Naming Polygons: A Comprehensive Guide

In this video, Mr. J explains how to name polygons based on the number of sides and angles they have. Starting with triangles, he progresses through quadrilaterals, pentagons, hexagons, and up to decagons. He provides mnemonic devices to help remember the names, such as associating 'hexagon' with the 'X' in six. The video also distinguishes between regular and irregular polygons, emphasizing that regular polygons have equal sides and angles. The tutorial concludes with a reminder that polygons are named by their sides and angles.

What does the term 'polygon' originate from?

• Latin words meaning 'many shapes'

• French words meaning 'multiple sides'

• German words meaning 'several lines'

• Greek words meaning 'many angles'

How are polygons named?

• By their area

• By the number of their sides and angles

• By the length of their sides

• By their color

What distinguishes a regular polygon from an irregular one?

• Irregular polygons cannot have more than five sides.

• Irregular polygons have sides of different lengths.

• Regular polygons have only right angles.

• Regular polygons have sides and angles of the same length and measure.

What is a four-sided polygon commonly known as?

• Hexagon

• Pentagon

• Quadrilateral

• Triangle

What is the shape of the building in Washington DC that helps to remember a five-sided polygon?

• Triangular

• Hexagonal

• Quadrilateral

• Pentagonal

How can you remember the name of a polygon with six sides?

• It is derived from the Latin word for six

• It is named after a famous hexagonal building

• It has an 'X' similar to 'six'

• It sounds like 'sixagon'

What are the two names for a seven-sided polygon?

• Heptagon and Septagon

• Decagon and Nonagon

• Hexagon and Octagon

• Hexagon and Septagon

Which polygon can either be called a heptagon or a septagon?

• Five-sided polygon

• Six-sided polygon

• Seven-sided polygon

• Eight-sided polygon

Which polygon is named similarly to an 'octopus'?

• Heptagon

• Octagon

• Nonagon

• Decagon

What prefix is used to remember a polygon with ten sides?

• Non

• Octa

• Deca

• Hexa