11 4 Volumes of Prisms and Cylinders Focused Learning Target: CA Standard(s): Vocabulary:
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1 Ch 11 : Surface Area and Volume 11 4 Volumes of Prisms and Cylinders 11 5 Volumes of Pyramids and Cones 11 6 Surface Areas and Volumes of Spheres 11 7 Areas and Volumes of Similar Solids 11 4 Volumes of Prisms and Cylinders Find the volume of a prism Geo 8.0 Find the volume of a cylinder Geo 9.0 Vocabulary: Volume: is a measure of space figure occupies. It is measured in cubes. Composite space figure: is a there dimensional figure that is the combination of two or more simpler figures. Example 1: Finding Volume of a Rectangular Prism: Find the volume of the prism. Find the volume of the prism. Find the volume of the prism. 1
2 Example 2: Finding Volume of a Triangular Prism: Find volume of the triangular prism Find volume of the triangular prism Find volume of the triangular prism Example : Finding Volume of a Cylinder: Find the volume of the cylinder. Leave your answer in term o f. Find the volume of the cylinder to the nearest tenth. Find the volume of the cylinder to the nearest tenth. 2
3 Example 4: Finding Volume of a Composite Figure: Find the volume of the backpack Find the volume of the prism to the nearest whole number. Find the volume of the prism to the nearest whole number Volumes of Pyramids and Cones Find the volume of a pyramid Find the volume of a cone Geo 8.0 Geo 9.0 Example 1: Finding Volume of a Pyramid Find the volume of the pyramid. Find the volume of the pyramid.
4 Example 2: Finding Volume of an Oblique Cone: Find the volume of the cone in term of Find the volume of the cone. Round your answer to the nearest tenth. Find the volume of the cone. Round your answer to the nearest tenth. Example : Real World Connection: An ice cream cone is 7 cm tall and 4 cm in diameter. About how much ice cream can fit entirely inside the cone? Find the volume to the nearest whole number. A small child s teepee is 6 ft tall and 7 ft in diameter. Find the volume of the teepee to the nearest cubic foot. In a chemistry lab you use a filter paper cone to filter a liquid. The diameter of the cone is 6.5 cm and its height is 6 cm. How much liquid will the cone hold when it is full? 4
5 11 6 Surface Areas and Volumes of Spheres Find the surface area and volume of a sphere Vocabulary: Sphere Center, radius, diameter, circumference (of a sphere) Geo 8.0 Geo 9.0 Great circle hemisphere Remember, the vocabulary words can all be found in Ch 11 Surface Area notes. Find the volume of the sphere below: You try: Find the volume of the sphere below. Leave your answer in terms of pi: You Try: Find the volume of the sphere below. Leave your answer in terms of pi: (r = 7.5) Challenge Problem: (you try) Which would weigh more? Two spherical rocks with 6 inch radius, or one spherical rock with a 10 inch radius. (assume that all rocks are the same type of stone). Justify your answer. 5
6 11 7 Areas and Volumes of Similar Solids Find the relationships between the ratios of the areas and volumes of similar solids Vocabulary: Similar solids Similarity ratio Geo 11.0 Similar solids have the same shape and their corresponding dimensions are proportional. The ratio of corresponding linear dimensions of two similar solids is the similarity ratio. Any two cubes are similar, as are any two spheres. Identifying Similar Solids: Are the two rectangular prisms similar? If so, give the similarity ratio. We ll do one together: Are the two rectangular prisms similar? If so, give the similarity ratio. You Try: Are the two cylinders similar? If so, give the similarity ratio. Finding the Similarity Ratio: Find the similarity ratio of two cubes with volumes of 729cm and 11cm. We ll do one together: Find the similarity ratio of two similar cylinders with volumes of 512cm and 1728cm. 6
7 You Try: Find the similarity ratio of two similar rectangular prisms with volumes of 125cm and 1000cm. Using similarity Ratios: The lateral areas of two similar paint cans are 1019 cm 2 and 425 cm 2. The volume of the small can is 1157 cm. Find the volume of the large can.. We ll do one together: A cylinder 6 in. in diameter and 12 in. high holds 4.5 lbs of oatmeal. To the nearest ounce, how much oatmeal will a similar 6 in. high cylinder hold? (16 ounces = 1lb) You Try: A marble paperweight shaped like a pyramid weighs 0.15 lb. How much does a similarly shaped marble paperweight weigh if each dimension is three times as large? 7
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