pre-algebra unit 9 review. unit 9 review 1) find the surface area. 2 cm 4 cm
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Pre-AlgebraUnit 9Review
Unit 9 Review
1) Find the surface area.
2 cm
4 cm
1) Find the surface area.
Unit 9 ReviewAnswer
SA = 50.24 cm2
2 cm
4 cm
4 cm
C = d = 3.14(4) = 12.56
Arect = 2(12.56) = 25.12 cm2
Acircle = r2 = 3.14(2)(2) = 12.56 cm2
Acircle = 12.56 cm2
Unit 9 Review
2) Find the surface area.
16 cm
2) Find the surface area.
Unit 9 ReviewAnswer
SA = 4r2 = 803.84 cm2
16 cm
Unit 9 Review
3) Find the volume.
16 cm
3) Find the volume.
Unit 9 ReviewAnswer
V = r3 = 2143.6 cm3
16 cm
Unit 9 Review
4) Find the volume.
2 cm
4 cm
4) Find the volume.
Unit 9 ReviewAnswer
V = 25.12 cm3
2 cm
4 cmAcircle = r2 = 3.14(2)(2) = 12.56 cm2
Unit 9 Review
5) Find the surface area and volume.
5 ft
10 ft
9.7 ft
5) Find the surface area and volume.
Unit 9 ReviewAnswer
V = 75 ft3
5 ft
10 ft
9.7 ft
5 ft
5 ft
10 ft
25 ft2
25 ft2
25 ft2
25 ft2
25 ft2
SA = 125 ft2
6) Find the surface area and volume.
Unit 9 Review
9 in
12.8 in12 in
6) Find the surface area and volume.
Unit 9 ReviewAnswer
SA = B + ½ Cl
= r2 + ½ dl
= 63.59 + 180.86
= 244.5 in2
V = Bh = r2h
= 254.4 in3
9 in
12.8 in12 in
7) Your company makes snow globes. One model has a conical tree inside. How much water would it take to fill each globe?
Unit 9 Review
24 cm
20
10 cm
7) Your company makes snow globes. One model has a conical tree inside. How much water would it take to fill each globe?
Unit 9 ReviewAnswer
Vglobe = r3 = 7234.6 cm3
Vtree = Bh = r2h = 523.3 cm3
Vtotal = 7234.6 – 523.3 = 6711.3 cm3
24 cm
20
10 cm
Unit 9 Review
8) If this ice cream cone looks like a hemisphere placed on top of a cone, what is the volume and surface area?
8 cm
4.5
10 cm
8)
Unit 9 ReviewAnswer
V = 360.36 cm3
SA = 268.47 cm2
8 cm
4.5
10 cm
If this ice cream cone looks like a hemisphere placed on top of a cone, what is the volume and surface area?