Volume of Cylinders: Key Concepts and Applications

This video tutorial covers Chapter 8, Lesson 1 on the volumes of cylinders. It begins with an introduction to the lesson's objectives and vocabulary, including terms like volume, cylinder, and composite solids. The key concepts and formulas for calculating the volume of a cylinder are explained, followed by three examples. The first example demonstrates a basic volume calculation, the second applies the concept to a real-world problem involving weight, and the third deals with composite solids. The lesson concludes with a summary and encourages students to review the material and bring questions to class.

What is the measure of the space occupied by a solid called?

• Area

• Volume

• Perimeter

• Density

What shape is described as a three-dimensional figure with two parallel congruent bases connected by a curved surface?

• Cone

• Cube

• Sphere

• Cylinder

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What is the formula for calculating the volume of a cylinder?

• V = lwh

• V = πr^2h

• V = (4/3)πr^3

• V = 2πrh

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If the radius of a cylinder is doubled, how does the volume change?

• It stays the same

• It doubles

• It quadruples

• It increases eightfold

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CCSS.8.G.C.9

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How do you find the volume of a cylinder if given the diameter instead of the radius?

• Use the diameter directly in the formula

• Square the diameter before using it

• Multiply the diameter by π

• Divide the diameter by 2 to find the radius

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CCSS.8.G.C.9

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What is the volume of a cylinder with a radius of 3 cm and a height of 10 cm? (Use π = 3.14)

• 282.6 cm³

• 376.8 cm³

• 94.2 cm³

• 188.4 cm³

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CCSS.8.G.C.9

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In a composite solid that includes a cylinder, how do you find the volume of the solid?

• Divide the solid's volume by the cylinder's volume

• Multiply the volumes of the cylinder and the solid

• Add the cylinder's volume to the solid's volume

• Subtract the cylinder's volume from the solid's volume

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If a cylinder's height is halved, how does the volume change?

• It is halved

• It is doubled

• It remains unchanged

• It is quadrupled

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CCSS.8.G.C.9

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What is the volume of a cylinder with a radius of 5 inches and a height of 7 inches? (Use π = 3.14)

• 110 cm³

• 550 cm³

• 275 cm³

• 220 cm³

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CCSS.8.G.C.9

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What is the first step in solving a problem involving the volume of a cylinder?

• Write down the volume formula

• Determine the radius

• Calculate the base area

• Identify the height

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CCSS.8.G.C.9

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