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 Do Now 1.Watch Find Missing Dimensions Using the Volume Formula VideoFind Missing Dimensions Using the Volume Formula Video 2.Complete pg. 674 #14 & 15

Concept

Example 3 Find the Missing Length BAKING Cake batter is poured into a pan that is a rectangular prism with an 8-inch square base. If the cake batter occupies 192 cubic inches, what will be the height of the batter? Answer: The height of the batter is 3 inches. V=BhFormula for volume of a prism V= ℓ ● w ● hReplace B with ℓ ● w. 192=8 ● 8 ● hReplace V with 192, ℓ with 8, and w with =64hSimplify. 3=hDivide each side by 64.

Example 3 A.2 feet B.4 feet C.8 feet D.30 feet SWIMMING POOLS A swimming pool is filled with 960 cubic feet of water. The pool is a rectangular prism 20 feet long and 12 feet wide and is the same depth throughout. Find the depth of the water.

Example 4 Find the volume of the solid. A. 262 m 3 B. 972 m 3 C. 918 m 3 D m 3 Read the Test Item The solid is made up of a rectangular prism and a triangular prism. The volume of the solid is the sum of both volumes.

Example 4 Rectangular Prism Triangular Prism V = ℓwh V = Bh Answer: The answer is D. Solve the Test Item V = 972 V = 486 The volume of the figure is or 1458 cubic meters. V = 12 ● 9 ● 9

Example 4 Find the volume of the solid.

Concept