# Nets, Surface Area & Volume: Student Activity Lesson Plan

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2 : Student Activity Lesson Plan Consolidation (~ 10 minutes including post-assessment) Ask students the following questions: 1. Q: What is an easy way to remember the volume of a rectangular prism and rectangular pyramid? (Volume of rect. prism is base*h, volume of rect. pyramid is 1/ (base*h)). Q: What is an easy way to remember the volume of a cylinder and a cone? (Volume of cylinder is base*h, volume of cone is 1/ (base*h)). Q: If two boxes have the same volume, must they also have the same surface area? (No) 4. Q: What implications does this have for manufacturers of products that come in boxes? (Save costs on packaging by reducing surface area of box, preserve volume of product) 5. Distribute post-assessment (approx. 5 minutes) Teacher-Created Resources: Student Activity Lesson Plan Page of

3 Student Activity Pre-Assessment Name: Birthday: 14 Answer all questions fully and show your work. 1. Match each shape to it s name: [6 marks] a. Triangular Prism b. Rectangular Pyramid c. Cylinder d. Rectangular Prism e. Cone f. Triangular Pyramid. Determine the volume of a rectangular prism with length metres, width metres, and height metres. [ marks]. Using your answer from part, determine the volume of a rectangular pyramid with the same dimensions. [ marks] 4. Sketch the net of a triangular pyramid. [1 mark] 5. Use the sketch in part 4 to calculate the surface area of the triangular pyramid if the base area is 5 cm, and the area of each side is 8 cm. [ marks] Teacher-Created Resources: Student Activity Pre-Assessment

4 Student Activity Pre-Assessment Name: Birthday: 14 Answer all questions fully and show your work. Answer Key 1. Match each shape to it s name: [6 marks] a. b Triangular Prism b. e Rectangular Pyramid c. d Cylinder d. c Rectangular Prism e. f Cone f. a Triangular Pyramid 1. V = lwh [ marks] = = 7m. V = 1/ volume (rectangular prism) [ marks] = 1/(7) = 9 m. Sketch the net of a triangular pyramid. [1 mark] 4. SA = base area + (side area) [ marks] SA = 5 + * (8) SA = SA = 8cm Teacher-Created Resources: Student Activity Pre-Assessment

5 Student Activity Handout Name: Date: 4 Part A: Nets Demonstration For each shape, write its name and sketch its net: [1 marks] Shape Name Net Teacher-Created Resources: Student Activity Handout Page 1 of 4

6 Student Activity Handout Name: Date: Part B: Volume Go to the following link: Make sure that Volume is selected for each side of the learning object. 1. Select each shape and notice the volume formula below. What do the formulas for the volume of all shapes have in common? [1 mark]. Select a rectangular prism on one side of the learning object and a rectangular pyramid on the other. a. Adjust the dimensions of each shape using the sliders to fill in the chart below: [6 marks] Trial Shape Length Width Height Volume 1 Rectangular Prism 5 8 Rectangular Pyramid 5 8 Rectangular Prism 7 9 Rectangular Pyramid 7 9 Rectangular Prism Rectangular Pyramid b. For each trial, the rectangular prism and rectangular pyramid had the same dimensions. What is the relationship between the volumes of these two shapes? [1 mark] c. How does your answer in b) relate to the volume equations for the rectangular prism and rectangular pyramid? [ marks] Volume of Rectangular Prism: Volume of Rectangular Pyramid:. What other two shapes have the same relation as that in part b? [1 mark] Teacher-Created Resources: Student Activity Handout Page of 4

7 Student Activity Handout Name: Date: 4. Label the following diagrams and use the formulas given on the learning object to calculate the volume of the following shapes: a. Triangular Prism (a = 11, b =, h = ) : [ marks] Trian V = b. Cone (r = 1, h = 0) : [ marks] V = Part C: Surface Area Make sure that Surface Area is selected for each side of the learning object. 1. Select a cylinder on one side of the learning object. a. Determine the surface area of a cylinder with radius cm and height 5 cm using the formula given on the learning object (show all steps): [ marks] SA = b. Sketch the net for a cylinder from question 1a) and label the net using the same dimensions as above. [ marks] i. How can you determine the surface area of the cylinder using this net? [1 mark] Teacher-Created Resources: Student Activity Handout Page of 4

8 Student Activity Handout Name: Date: ii. How does the method in b i) compare to the method in a)? [1 mark]. In general, the surface area of a shape can be found by the shapes on the net together. [1 mark]. A manufacturer produces rectangular boxes with length m, width 5 m, and height m. By increasing the height metres, the volume doubles. a. Create two boxes on the learning object with these dimensions (the volume of the second box should be double that of the first). b. Does this mean that the surface area of the second box is also double that of the first? Why or why not? [ marks] c. What implications does this have for the manufacturer? [1 mark] Teacher-Created Resources: Student Activity Handout Page 4 of 4

9 Student Activity Handout Answer Key Name: Answer Key for Teacher 4 Part A: Nets Demonstration For each shape, write its name and sketch its net: [1 marks] Shape Name Net Rectangular Prism Rectangular Pyramid Triangular Prism Triangular Pyramid Cylinder Cone Teacher-Created Resources: Student Activity Handout Answer Key Page 1 of 4

10 Student Activity Handout Answer Key Name: Answer Key for Teacher Part B: Volume Go to the following link: Make sure that Volume is selected for each side of the learning object. 1. Select each shape and notice the volume formula below. What do the formulas for the volume of all shapes have in common? [1 mark] Formulas all include area of base * height.. Select a rectangular prism on one side of the learning object and a rectangular pyramid on the other. a. Adjust the dimensions of each shape using the sliders to fill in the chart below: [6 marks] Trial Shape Length Width Height Volume Rectangular Prism m 1 Rectangular Pyramid m Rectangular Prism m Rectangular Pyramid m Rectangular Prism m Rectangular Pyramid b. For each trial, the rectangular prism and rectangular pyramid had the same dimensions. What is the relationship between the volumes of these two shapes? The volume of the rectangular pyramid is 1/ the volume of the rectangular prism. [1 mark] c. How does your answer in b) relate to the volume equations for the rectangular prism and rectangular pyramid? 1 Volume of Rectangular Prism: lwh Volume of Rectangular Pyramid: lwh [ marks] The volume formula for the rectangular pyramid is 1/ the volume formula for the rectangular prism. [1 mark]. What other two shapes have the same relation as that in part b? [1 mark] Cylinder and cone also have this volume ratio in common. Teacher-Created Resources: Student Activity Handout Answer Key Page of 4

11 Student Activity Handout Answer Key Name: Answer Key for Teacher 4. Label the following diagrams and use the formulas given on the learning object to calculate the volume of the following shapes: a. Triangular Prism (a = 11, b =, h = ) : [ marks] Trian V 1 = abh 1 = 11 = m b. Cone (r = 1, h = 0) : [ marks] V 1 = πr h 1 = π m Part C: Surface Area Make sure that Surface Area is selected for each side of the learning object. 1. Select a cylinder on one side of the learning object. a. Determine the surface area of a cylinder with radius cm and height 5 cm using the formula given on the learning object (show all steps): [ marks] SA = πr = π + πr 87.9 cm + π + πdh + π 4 5 b. Sketch the net for a cylinder from question 1a) and label the net using the same dimensions as above. [ marks] i. How can you determine the surface area of the cylinder using this net? [1 mark] Add the areas of the three shapes in the net together to find the surface area. Teacher-Created Resources: Student Activity Handout Answer Key Page of 4

12 Student Activity Handout Answer Key Name: Answer Key for Teacher ii. How does the method in b i) compare to the method in a)? [1 mark] This is the same method used in part 1a!. In general, the surface area of a shape can be found by adding the shapes on the net together. [1 mark]. A manufacturer produces rectangular boxes with length m, width 5 m, and height m. By increasing the height metres, the volume doubles. a. Create two boxes on the learning object with these dimensions (the volume of the second box should be double that of the first). b. Does this mean that the surface area of the second box is also double that of the first? Why or why not? [ marks] Surface area on second box is NOT double that of first box because surface area is not proportional to volume. c. What implications does this have for the manufacturer? [1 mark] The manufacturer could double the volume of box and save money on packaging (surface area). Teacher-Created Resources: Student Activity Handout Answer Key Page 4 of 4

13 Student Activity Post-Assessment Name: Birthday: 14 Instructions: Answer all questions fully and show your work. 1. Match each shape to it s name: [6 marks] a. Cylinder b. Triangular Pyramid c. Rectangular Pyramid d. Rectangular Prism e. Cone f. Triangular Prism. Determine the volume of a rectangular prism with length metres, width metres, and height metres. [ marks]. Using your answer from part, determine the volume of a rectangular pyramid with the same dimensions. [ marks] 4. Sketch the net of a triangular pyramid. [1 mark] 5. Use the sketch in part 4 to calculate the surface area of the triangular pyramid if the base area is 5 cm, and the area of each side is 8 cm. [ marks] Teacher-Created Resources: Student Activity Post-Assessment

14 Student Activity Post-Assessment Instructions: Answer all questions fully and show your work. 1. Match each shape to it s name: [6 marks] Name: Birthday: 14 Answer Key a. d Cylinder b. a Triangular Pyramid c. e Rectangular Pyramid d. b Rectangular Prism e. f Cone f. a Triangular Prism. V = lwh [ marks] = = 7m. V = 1/ volume (rectangular prism) [ marks] = 1/(7) = 9 m 4. Sketch the net of a triangular pyramid. [1 mark] 5. SA = base area + (side area) [ marks] SA = 5 + * (8) SA = SA = 8cm Teacher-Created Resources: Student Activity Post-Assessment

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