Surface Area of Rectangular Prisms

Mr. Rag explains how to find the total and lateral surface area of a rectangular prism. He defines surface area as the area occupied by the surfaces of a 3D figure and distinguishes between total and lateral surface area. The video demonstrates calculating lateral surface area by excluding the base areas and then calculating total surface area by including them. The process involves using the formula for the area of a rectangle and adding the areas of the relevant faces.

What is the primary focus when calculating the surface area of a three-dimensional figure?

• Length of the edges

• Area occupied by the surfaces

• Volume of the figure

• Height of the figure

Which type of surface area includes all the faces of a three-dimensional figure?

• Vertical surface area

• Lateral surface area

• Total surface area

• Base surface area

What does lateral surface area exclude in its calculation?

• The side faces

• Only the top face

• All faces

• The base faces

In the context of a rectangular prism, what is the significance of the shaded 3x2 rectangle?

• It is one of the base faces

• It is one of the lateral faces

• It is the largest face

• It represents the total surface area

How many rectangles are considered when calculating the lateral surface area of the given prism?

• Four

• Five

• Three

• Two

What is the area of the first rectangle used in the lateral surface area calculation?

• 12 square cm

• 18 square cm

• 24 square cm

• 30 square cm

What is the total lateral surface area of the rectangular prism?

• 60 square cm

• 54 square cm

• 48 square cm

• 66 square cm

What additional areas are included in the total surface area calculation?

• The diagonal faces

• The base areas

• Only the top face

• Only the lateral faces

What is the area of one base of the rectangular prism?

• 12 square cm

• 6 square cm

• 3 square cm

• 9 square cm

What is the total surface area of the rectangular prism?

• 72 square cm

• 66 square cm

• 60 square cm

• 78 square cm