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Bell Work

Bell Work . Find the volume of the figures below. Round to the nearest tenth if necessary. . V = 1/3( π r 2 )h V = 1/3( π • 179.56) 15.9 V = 1/3(2855.004) π V = 2988.23752 V = 2988.2 mm 3. V = 1/3(½ bh )h V = 1/3(½ • 8 • 6) 10 V = 1/3(24) • 10 V = 8 •10 V = 80 ft. 3. Homework!.

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Bell Work

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  1. Bell Work • Find the volume of the figures below. Round to the nearest tenth if necessary. V = 1/3(πr2)h V = 1/3(π • 179.56) 15.9 V = 1/3(2855.004)π V = 2988.23752 V = 2988.2 mm3 V = 1/3(½ bh)h V = 1/3(½ • 8 • 6) 10 V = 1/3(24) • 10 V = 8 •10 V = 80 ft.3

  2. Homework!

  3. Surface Area of Prisms

  4. Surface Area of Prisms

  5. Surface Area of Prisms

  6. Surface Area of Prisms

  7. ✔Check Your Progress • Find the Surface Area of each Rectangular Prism. SA = 2bh + 2bw + 2hw SA = 2(10 x 6) + 2(10 x 3) + 2(6 x 3) SA = 2(60) + 2(30) + 2(18) SA = 120 + 60 + 36 SA = 216 m2 SA = 2bh + 2bw + 2hw SA = 2(11.2 x 11.2) + 2(11.2 x 3) + 2(11.2 x 3) SA = 2(125.44) + 2(33.6) + 2(33.6) SA = 250.88 + 67.2 + 67.2 SA = 385.28 SA = 385.3 mm2

  8. Surface Area of Prisms

  9. ✔Check Your Progress • Find the Surface Area of each Triangular Prism. Round your answers to the nearest tenth. Triangular bases = ½ • 12 • 9 = 54 One rectangular side = 21 x 12 = 252 One rectangular side = 15 x 21 = 315 One rectangular side = 9 x 21 = 189 SA = 54 + 54 + 252 + 315 + 189 SA = 864 mm2 Triangular bases = ½ • 5 • 5 = 12.5 Two rectangular sides = 5 x 10 = 50 One rectangular side = 10 x 7= 70 SA = 12.5 + 12.5 + 50 + 50 + 70 SA = 195 in.2

  10. Surface Area of Cylinders

  11. Surface Area of Cylinders

  12. Surface Area of Cylinders

  13. Surface Area of Cylinders

  14. Surface Area of Cylinders SA = 2πrh + 2πr2 SA = 2π(3)(9) + 2π(3)2 SA = 54π + 18π SA = 226.08 ft.3 SA = 226.1 ft.3

  15. ✔Check Your Progress SA = 2πrh + 2πr2 SA = 2π(5.1)(2.9) + 2π(5.1)2 SA = 29.58π + 52.02π SA = 81.6π SA = 256.224 cm2 SA = 256.2 cm2

  16. Exit Slip Answer the following in complete thought sentences. • Explain how to find the surface area of figure if you do not know the formula.

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