Understanding Pyramids

In this video, Mr. J explains how to name pyramids based on their base shape. He begins by defining a pyramid as a 3D figure with a polygonal base and triangular faces that meet at an apex. The video covers examples of pyramids with different bases, such as square, triangular, and pentagonal pyramids. Mr. J also provides a counter example of a cone, explaining why it is not a pyramid due to its curved base. The video concludes with a reminder that pyramids can have any polygonal base.

What is the apex of a pyramid?

• The center of the base

• The longest side of the pyramid

• The point where all triangular faces meet

• The base of the pyramid

How do you determine the name of a pyramid?

• By the color of the pyramid

• By the number of triangular faces

• By the shape of its base

• By the height of the pyramid

What is the base shape of a square pyramid?

• Hexagon

• Square

• Pentagon

• Triangle

Which of the following is not a pyramid?

• Pentagonal pyramid

• Square pyramid

• Triangular pyramid

• Cone

Why is a cone not considered a pyramid?

• It has a circular base

• It has more than one base

• It has no apex

• It is not three-dimensional

What must a polygon have to be considered a base of a pyramid?

• Curved sides

• Open edges

• Line segments

• Multiple colors

Which of the following is a characteristic of a polygon?

• It must be flat and closed

• It must be three-dimensional

• It must have curved sides

• It must be open

What is a key feature of all pyramids?

• They have a circular base

• They have triangular faces

• They have no apex

• They are two-dimensional

Can a pyramid have a base that is not a polygon?

• Yes, as long as it is flat

• No, it must be a circle

• No, the base must be a polygon

• Yes, any shape can be a base

What is the significance of the base in naming a pyramid?

• It determines the material of the pyramid

• It determines the name of the pyramid

• It determines the color of the pyramid

• It determines the height of the pyramid