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10-8 Finding Volume Course 1 Warm Up Warm Up Lesson Presentation Lesson Presentation Problem of the Day Problem of the Day

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Warm Up Find the surface area of each figure. Use 3.14 for . Course 1 10-8 Finding Volume 432 in 2 226.08 ft 2 1. rectangular prism with base length 8 in., width 6 in., and height 12 in. 2. cylinder with diameter 8 ft and height 5 ft

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Problem of the Day A rectangular park is bordered by a 3- foot-wide sidewalk. The park, including the sidewalk, measures 125 ft by 180 ft. What is the area of the park, not including the sidewalk? 20,706 ft 2 Course 1 10-8 Finding Volume

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Learn to estimate and find the volumes of rectangular prisms and triangular prisms. Course 1 10-8 Finding Volume

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Vocabulary volume Insert Lesson Title Here Course 1 10-8 Finding Volume

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Volume is the number of cubic units needed to fill a space. Course 1 10-8 Finding Volume

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It takes 10, or 5 · 2, centimeter cubes to cover the bottom layer of this rectangular prism. There are 3 layers of 10 cubes each. It takes 30, or 5 · 2 · 3, cubes to fill the prism. The volume of the prism is 5 cm · 2 cm · 3 cm = 30 cm 3. Course 1 10-8 Finding Volume

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The volume of a rectangular prism is the area of its base times its height. This formula can be used to find the volume of any prism. VOLUME OF A PRISM The volume V of a prism is the area of its base B times its height h. V = Bh

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Additional Example 1: Finding the Volume of a Rectangular Prism Find the volume of the rectangular prism. V = Bh Write the formula. V = 26 11 13l = 26; w = 11; h = 13 Multiply.V = 3,718 in 3 13 in. 26 in. 11 in. Course 1 10-8 Finding Volume

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Additional Example 1: Finding the Volume of a Rectangular Prism Find the volume of the rectangular prism. V = Bh Write the formula. V = 26 11 13l = 26; w = 11; h = 13 Multiply.V = 3,718 in 3 13 in. 26 in. 11 in. Course 1 10-8 Finding Volume

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Additional Example 1: Finding the Volume of a Rectangular Prism Find the volume of the rectangular prism. V = Bh Write the formula. V = 26 11 13l = 26; w = 11; h = 13 Multiply.V = 3,718 in 3 13 in. 26 in. 11 in. Course 1 10-8 Finding Volume

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Try This: Example 1 Find the volume of the rectangular prism. V = Bh Write the formula. V = 29 12 16l = 29; w = 12; h = 16 Multiply.V = 5,568 in 3 16 in. 29 in. 12 in. Course 1 10-8 Finding Volume

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To find the volume of any prism, you can use the formula V= Bh, where B is the area of the base, and h is the prism’s height. So, to find the volume of a triangular prism, B is the area of the triangular base and h is the height of the prism. Course 1 10-8 Finding Volume

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Additional Example 2A: Finding the Volume of a Triangular Prism Find the volume of each triangular prism. A. V = BhWrite the formula. V = ( 3.9 1.3) 4 1 2 __ B = 3.9 1.3; h = 4. 1 2 __ Multiply.V = 10.14 m 3 Course 1 10-8 Finding Volume

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Additional Example 2B: Finding the Volume of a Triangular Prism Find the volume of the triangular prism. B. V = BhWrite the formula. V = ( 6.5 7) 6 1 2 __ B = 6.5 7; h = 6. 1 2 __ Multiply.V = 136.5 ft 3 Course 1 10-8 Finding Volume

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Try This: Example 2A Find the volume of each triangular prism. A. V = BhWrite the formula. V = ( 4.2 1.6) 7 1 2 __ B = 4.2 1.6; h = 7. 1 2 __ Multiply.V = 23.52 m 3 1.6 m 7 m 4.2 m Course 1 10-8 Finding Volume

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Try This: Example 2B Find the volume of each triangular prism. B. V = BhWrite the formula. V = ( 4.5 9) 5 1 2 __ B = 4.5 9; h = 5. 1 2 __ Multiply. V = 101.25 ft 3 4.5 ft 5 ft 9 ft Course 1 10-8 Finding Volume

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Lesson Quiz Find the volume of each figure. 1. rectangular prism with length 20 cm, width 15 cm, and height 12 cm 2. triangular prism with a height of 12 cm and a triangular base with base length 7.3 cm and height 3.5 cm 3. Find the volume of the figure shown. Insert Lesson Title Here 3,600 cm 3 153.3 cm 3 38.13 cm 3 Course 1 10-8 Finding Volume

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