Three-Dimensional Shapes

The video tutorial introduces basic geometry concepts, focusing on 2D and 3D shapes. It begins with an explanation of plane shapes like squares, circles, and triangles, and distinguishes polygons from non-polygons. The tutorial then transitions to 3D shapes, explaining how adding a dimension to a square forms a cube, which has six faces, 12 edges, and eight vertices. It further explores pyramids, cones, cylinders, and rectangular prisms, detailing their faces, edges, and vertices. The video concludes with a brief introduction to spheres and encourages viewers to identify 3D shapes in their surroundings.

Which of the following is NOT a polygon?

• Rectangle

• Square

• Circle

• Triangle

How many faces does a cube have?

• 8

• 6

• 5

• 4

What is the total number of edges in a cube?

• 12

• 8

• 14

• 10

How many vertices does a pyramid with a square base have?

• 8

• 6

• 5

• 4

What shape is formed when a pyramid's base is replaced with a circle?

• Cylinder

• Cone

• Sphere

• Rectangular Prism

How many faces does a cylinder have?

• 1

• 2

• 3

• 4

Which 3D shape has no edges or vertices?

• Cylinder

• Cube

• Sphere

• Cone