Finding the Volume of an Irregular 3D Solid: Additive Property of Volume

This lesson explains that volume is additive by demonstrating how to find the volume of a 3D figure composed of two rectangular prisms. It covers the basic formula for calculating the volume of a rectangular prism and applies it to a complex shape by dividing it into simpler parts. The lesson also includes determining missing edge lengths and calculating the composite volume of the shape.

What is the formula to calculate the volume of a rectangular prism?

• Width x Height

• Length x Width

• Length x Width x Height

• Length + Width + Height

How can a complex 3D shape be simplified to find its volume?

• By dividing it into smaller rectangular prisms

• By ignoring the shape's dimensions

• By using only the height of the shape

• By estimating the volume

What is the first step in finding the volume of a composite shape?

• Add the lengths of all edges

• Determine the missing edge lengths

• Calculate the total surface area

• Estimate the volume visually

If a cube has edge lengths of 2 inches, what is its volume?

• 6 cubic inches

• 4 cubic inches

• 10 cubic inches

• 8 cubic inches

What is the total volume of a composite shape made of a cube and a rectangular prism with volumes of 8 cubic inches and 16 cubic inches, respectively?

• 20 cubic inches

• 22 cubic inches

• 24 cubic inches

• 26 cubic inches