Splash Screen. Then/Now You have already found the areas of rectangles and triangles. (Lesson 5–1) Find volumes of prisms. Find volumes of composite figures.

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Presentation transcript:

Splash Screen

Then/Now You have already found the areas of rectangles and triangles. (Lesson 5–1) Find volumes of prisms. Find volumes of composite figures.

Concept

Example 1 Find the Volume of a Rectangular Prism Find the volume of the rectangular prism. V=BhFormula for volume of a prism V=(ℓ ● w)hThe base is a rectangle, so B = ℓ ● w. V=(25 ● 16)8ℓ = 25, w = 16, h = 8 V=3200Simplify. Answer: The volume is 3200 cubic centimeters.

Example 1 CYP A.11.5 ft 3 B.22.5 ft 3 C.45 ft 3 D.81 ft 3 Find the volume of the prism.

Example 2 Volume of a Triangular Prism Find the volume of the triangular prism. The height of the prism is 3 in. Answer: The volume is 15 cubic inches. V=BhFormula for volume of a prism V = 15Simplify. The base is a triangle, so.

Example 2 A.33.5 ft 3 B.30 ft 3 C.15 ft 3 D.10.5 ft 3 Find the volume of the triangular prism.