1

3 Area of Base

Volume: Pyramids, Cones and Spheres

Volume of a Pyramid or Cone =

h

Volume of a Pyramid1

3 whVolume of a Cone

1

3h r 2

r

Volume: Pyramids, Cones and Spheres

r

Volume of a Sphere

4

3 r 3

Volume: Pyramids, Cones and Spheres

2 cm

5 cm

1.

3

1 2V

1

3h r 2V

3.14 2 5

3

1V 3.14 20

3

1V 62.8 = 20.9 cm3

3

1V

3

1V

Volume: Pyramids, Cones and Spheres

8 8 12

64 12

64 = 256 m3

8 m 8 m

12 m2.

V 1

3wh

4 V

Volume: Pyramids, Cones and Spheres3. You build a snowman with spheres of snow. How much snow do you need to make the bottom sphere?

4 ft4

3 r 3

3 3

4314. 2 814.3

3

4

100 48

3

.32 5. ft3

V

Pg 549 10 – 9 #1 – 6, 8 – 15 Find the volume of each figure, to the nearest cubic unit.

3

1V

3

1V 9 9 8

9 72

72 = 216 in3

9 in 9 in

8 in1.

V 1

3wh

3

Pg 549 10 – 9 #1 – 6, 8 – 15 Find the volume of each figure, to the nearest cubic unit.

2 yd

6 yd6 yd

3

1 2V

1

3h r 2V

3.14 2 6

3

1V 3.14 24

V 3.14 = 25 yd3

2.

8

Pg 549 10 – 9 #1 – 6, 8 – 15 Find the volume of each figure, to the nearest cubic unit.

40 in

25 in25 in 3

1 2V

1

3h r 2V

3.14 20 25

3

1V 3.14 10,000

3

1V 31,400 = 10,467 in3

3.

Pg 549 10 – 9 #1 – 6, 8 – 15 Find the volume of each figure, to the nearest cubic unit.

4

3 r 3

3 3

4314. 5

12514.33

4

3

1570 523 3in

10 in10 in

4.

Pg 549 10 – 9 #1 – 6, 8 – 15 Find the volume of each figure, to the nearest cubic unit.

4

3 r 3

3 3

4314. 1

114.33

4

3

56.12 4 3yd

2 yd2 yd

5.

Pg 549 10 – 9 #1 – 6, 8 – 15 Find the volume of each figure, to the nearest cubic unit.

4

3 r 3

3

3

4 314. 75.2

8.2014.33

4

3

21.261 87 3m

5.5 m5.5 m

6.

Pg 549 10 – 9 #1 – 6, 8 – 15