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Splash Screen

Find the volume of a rectangular prism with a length of 12 yards, a width of 14 yards, and a height of 9 yards. A. 1110 yd3 B. 1227 yd3 C. 1512 yd3 D. 2012 yd3 5-Minute Check 5

The volume of a triangular prism is 655 cubic feet The volume of a triangular prism is 655 cubic feet. The height of the prism is 5 feet. Find the area of one triangular base. A. 65.5 ft2 B. 131 ft2 C. 650 ft2 D. 660 ft2 5-Minute Check 6

Mathematical Practices Content Standards G.GMD.1 Give an informal argument for the formulas for the circumference of a circle, area of a circle, volume of a cylinder, pyramid, and cone. G.GMD.3 Use volume formulas for cylinders, pyramids, cones, and spheres to solve problems. Mathematical Practices 1 Make sense of problems and persevere in solving them. 7 Look for and make use of structure. CCSS

You found surface areas of pyramids and cones. Find volumes of pyramids. Find volumes of cones. Then/Now

Concept

Find the volume of the square pyramid. Volume of a Pyramid Find the volume of the square pyramid. Volume of a pyramid s 3, h 7 21 Multiply. Answer: The volume of the pyramid is 21 cubic inches. Example 1

Brad is building a model pyramid for a social studies project Brad is building a model pyramid for a social studies project. The model is a square pyramid with a base edge of 8 feet and a height of 6.5 feet. Find the volume of the pyramid. A. 416 ft3 B. C. D. Example 1

Concept

A. Find the volume of the oblique cone to the nearest tenth. Volume of a Cone A. Find the volume of the oblique cone to the nearest tenth. Example 2A

Answer: The volume of the cone is approximately 2168.0 cubic feet. Volume of a Cone Volume of a cone r = 9.1, h = 25 ≈ 2168.0 Use a calculator. Answer: The volume of the cone is approximately 2168.0 cubic feet. Example 2A

B. Find the volume of the cone to the nearest tenth. Volume of a Cone B. Find the volume of the cone to the nearest tenth. Example 2B

Answer: The volume of the cone is approximately 314.2 cubic inches. Volume of a Cone Volume of a cone r = 5, h = 12 ≈ 314.2 Use a calculator. Answer: The volume of the cone is approximately 314.2 cubic inches. Example 2B

A. Find the volume of the oblique cone to the nearest tenth. A. 444.4 m3 B. 27,463.2 m3 C. 3051.5 m3 D. 9154.4 m3 Example 2A

B. Find the volume of the cone to the nearest tenth. A. 3015.9 m3 B. 125.7 m3 C. 1005.3 m3 D. 251.3 m3 Example 2B

Answer: The volume of the pyramidion is 22,680 cubic centimeters. Find Real-World Volumes SCULPTURE At the top of a stone tower is a pyramidion in the shape of a square pyramid. This pyramid has a height of 52.5 centimeters and the base edges are 36 centimeters. What is the volume of the pyramidion? Round to the nearest tenth. Volume of a pyramid B = 36 ● 36, h = 52.5 Simplify. Answer: The volume of the pyramidion is 22,680 cubic centimeters. Example 3

SCULPTURE In a botanical garden is a silver pyramidion in the shape of a square pyramid. This pyramid has a height of 65 centimeters and the base edges are 30 centimeters. What is the volume of the pyramidion? Round to the nearest tenth. A. 18,775 cm3 B. 19,500 cm3 C. 20,050 cm3 D. 21,000 cm3 Example 3

Concept

End of the Lesson