Introduction to Polygons: Classification and Naming of Shapes

The video tutorial explains polygons, which are shapes with many sides. It covers the distinction between regular and irregular polygons, where regular polygons have equal side lengths and angles, while irregular ones do not. The tutorial also discusses convex polygons, which bulge outward with angles less than 180 degrees, and concave polygons, which cave inward with angles greater than 180 degrees. Finally, it provides names for polygons based on the number of sides, such as triangles, quadrilaterals, pentagons, and more.

What is a key characteristic of a polygon?

• It is always circular.

• It has curved sides.

• It has many sides.

• It has no sides.

How can you identify a regular polygon?

• It has no equal sides.

• All sides and angles are equal.

• It has at least one side longer than the others.

• All sides and angles are different.

What makes a polygon irregular?

• It has no sides.

• At least one side or angle is different.

• All angles are equal.

• All sides are equal.

What defines a convex polygon?

• All angles are greater than 180 degrees.

• It has at least one angle greater than 180 degrees.

• It has no angles.

• All angles are less than 180 degrees.

Which of the following is a characteristic of a concave polygon?

• All sides are equal.

• All angles are less than 180 degrees.

• It has at least one angle greater than 180 degrees.

• It has no angles.

What is the name of a seven-sided polygon?

• Nonagon

• Hexagon

• Heptagon

• Octagon

Which polygon has eight sides?

• Decagon

• Octagon

• Hexagon

• Pentagon