Today’s Plan: -Warm-up -Volume -Assignment LT: I can calculate the volume of prisms and cylinders. 04/12/11Volume of Prisms and Cylinders Entry Task: What.

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Today’s Plan: -Warm-up -Volume -Assignment LT: I can calculate the volume of prisms and cylinders. 04/12/11Volume of Prisms and Cylinders Entry Task: What is the difference between length, area, and volume?

Vocabulary volume Insert Lesson Title Here Course Volume of Prisms and Cylinders What is volume?

Course Volume of Prisms and Cylinders Any solid figure can be filled completely with congruent cubes and parts of cubes. The volume of a solid is the number of cubes it can hold. Each cube represents a unit of measure called a cubic unit.

Find how many cubes the prism holds. Then give the prism’s volume. Additional Example 1: Using Cubes to Find the Volume of a Rectangular Prism Course Volume of Prisms and Cylinders You can find the volume of this prism by counting how many cubes tall, long, and wide the prism is and then multiplying. 1 · 4 · 3 = 12 There are 12 cubes in the prism, so the volume is 12 cubic units.

Create a 2 by 2 by 4 rectangular prism. What is the volume? Today’s Plan: -Warm-up -Volume -Assignment LT: I can calculate the volume of prisms and cylinders. 04/12/11Volume of Prisms and Cylinders

Try This: Example 1 Insert Lesson Title Here Course Volume of Prisms and Cylinders Find how many cubes the prism holds. Then give the prism’s volume. You can find the volume of this prism by counting how many cubes tall, long, and wide the prism is and then multiplying. 2 · 4 · 3 = 24 There are 24 cubes in the prism, so the volume is 24 cubic units.

Course Volume of Prisms and Cylinders Volume = 1 cm 3 1 cm A cube that measures one centimeter on each side represents one cubic centimeter of volume. Suppose the cubes in the prism in Additional Example 1 measure one centimeter on each side. The volume of the prism would be 12 cm 3. This volume is found by multiplying the prism’s length times its width times its height. 1 cm Any unit of measurement with an exponent of 3 is a cubic unit. For example, cm 3 means “cubic centimeter” and in 3 means “cubic inch.” Reading Math

Find the volume of the prism to the nearest tenth. Additional Example 2: Using a Formula to Find the Volume of a Prism Course Volume of Prisms and Cylinders 4.1 ft 12 ft V = lwh Use the formula. V = 4.1 · 4.1 · 12 Substitute V = Multiply. The volume to the nearest tenth is ft 3.

Find the volume of the prism to the nearest tenth. Course Volume of Prisms and Cylinders 6.3 ft 8 ft Use the formula. V = 6.3 · 6.3 · 8 Substitute. V = Multiply. The volume to the nearest tenth is ft 3. Try This: Example 2 V = lwh

Course Volume of Prisms and Cylinders VOLUME OF A CYLINDER The volume V of a cylinder is the area of its base, r 2, times its height h. V = r 2 h

Find the volume of a cylinder to the nearest tenth. Use 3.14 for . Additional Example 3: Using a Formula to Find the Volume of a Cylinder Course Volume of Prisms and Cylinders V = r 2 h The radius of the cylinder is 5 m, and the height is 4.2 m V  3.14 · 5 2 · 4.2 V  The volume is about m 3. Use the formula. Substitute for r and h. Multiply.

Try This: Example 3 Insert Lesson Title Here Course Volume of Prisms and Cylinders V = r 2 h The radius of the cylinder is 7 m, and the height is 3.8 m V  3.14 · 7 2 · 3.8 V  The volume is about m 3. Use the formula. Substitute for r and h. Multiply. Find the volume of a cylinder to the nearest tenth. Use 3.14 for . 3.8 m 7 m

Lesson Quiz Find the volume of each solid to the nearest tenth. Use 3.14 for  cm 3 4,069.4 m 3 Insert Lesson Title Here 312 ft 3 Course Volume of Prisms and Cylinders 3. triangular prism: base area = 24 ft 2, height = 13 ft 1.2.

Today’s Plan: -Warm-up -Volume -Assignment LT: I can calculate the volume of prisms and cylinders. 04/12/11Volume of Prisms and Cylinders Assignment Page 478 #1-18 (Period 5 skip #4,6,13&14) Show formula, substitution, and answer for each problem.