mahsar

masa528 Chapter 9 **7.1**

**7.2**

**7.3**

**7.4**

**7.5**

**7.6**

1) Volume of a triangular prism V=Bh The height of a triangular prism is 3 feet. It's base is totalled to be 9 feet. V=(3)(9) V=27 feet 2) Surface area of a triangular prism SA=L+2B The length of a triangular prism is 5 meters. It's base is 2 meters SA=(5)+(2)(2) SA=9 meters

3) Volume of a pyramid V= (1/3) Bh The base edge equals 20 yards and the height equals 10 yards V=(1/3) 20²(10) V=1333 1/3 yards 4) Surface area of a pyramid SA=L+B The length of a roof equals 12 feet and the base is 10 feet SA= 12+10 SA= 22 feet

5) Volume of a cylinder V=Bh or V = (pi)r²h A cylinders base radius is 3 meters and its height is double the diameter V= (pi)3²(18) V= (pi)162 meters 6) Surface area of a cylinder SA = L + 2B or SA 2(pi)rh + 2(pi)r² The radius of a cylinder is 4 feet and it's height is 2 feet SA = 2(pi)(4)(2) + 2(pi)(4²) SA = 150.79 feet

7) Volume of a cone V = 1/3Bh or V 1/3(pi)r²h The radius of a cone is 15 centimeters, its height is 4 centimeters V = (1/3)(pi)(15²)(4) V = 942.47 centimeters 8) Surface area of a cone SA = L + B or SA (pi)rl + (pi)r² The radius of a right cone is 43 centimeters, its height is 49 centimeters SA = (pi)(43)(49) + (pi)43² SA = 12428.14 centimeters

9) Volume of a sphere V = 4/3(pi)r³ the radius of a sphere is 54 feet V = 4/3 (pi) 54³ V = 659583.66 feet 10) Surface area of a sphere SA = 4(pi)r² The radius of a sphere is 23 inches SA = 4(pi)23² SA = 6647.61 inches

__Key:__ S = Surface Area V = Volume L = Length B = Base h = height r = radius s = side