Today in class students did a great job with practicing finding the surface area and volume of different shapes. Got to work on knowing the difference between area and circumference of a circle!
Answers to HW: page with the cubes at the top... 1. 20 cubes 2. 8 cubes 3. 28 cubes 20 cubic units 8 cubic units 28 cubic units 4. 840 cubic cm 5. 288 cubic in 6. 1302 cubic cm 7. 1800 cubic cm 8. 611.8 cubic m 9. 9.9 cubic m 10. 3,617.3 cubic ft 11. 2,034.7 cubic cm 12. 106 cubic cm 1. 50 cubic cm 2. 320 cubic ft 3. 600 cubic m 4. 78 cubic m 5. 336 cubic in 6. 32.7 cubic mm page with nets of prisms and cylinders... 1. 294 square in 2. 88 square mm 3. 226.1 square in 4. 376.8 square cm 5. 502.4 square m 6. 2,009.6 square ft page with changing dimensions...we took notes about this; draw a couple of pictures and remember that area will have 2 new measurements, and volume will have 3 new ones 1. with a scale factor of 5 changing two dimensions, (5)(5) = 25 times the old area of 10 = 250 square in 2. 135 square m 3. 1,024 square cm 4. 160 square m 5. 900 square in 6. 729 square cm 7. with a scale factor of 2 changing three measurements, (2)(2)(2) = 8 times the old volume of 7 = 56 cubic yd 8. 1,728 cubic cm 9. 351 cubic m 10. 960 cubic ft 11. 2,875 cubic mm 12. 6,480 marbles page with the half full tanks of water... 8. 34,300 square cm 9. 19,320 square cm 10. 310 square ft 11. the container needs 720 cubic cm to fill it; after filling it up you need to pour out 960 cubic cm to leave it 1/3 full 12. the tank holds 864 cubic cm
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October 2018
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