THS Applied Geometry: Spheres!

On page 18 from your notes, what is the radius of the cylinder on #10?

(a)  

On page 18 from your notes, what is the area of the base? (remember that  $B\ =\ \pi r^2$  )

(a)  

On page 18 from your notes, what is the volume of the cylinder? (remember that  $V\ =\ \pi r^2\times h$  )

(a)  

On page 18 from your notes, what is the volume of the cylinder? (remember that $V\ =\ \pi r^2\times h$ )

• 4069.44

• 1296

• 452.16

The diameter of this baseball is 8 cm. What is it's radius?

• 4 cm

• 8 cm

• 16 cm

We just decided the radius is 4cm. 

Find the surface area of the baseball, keeping in mind that the formula for surface area of a sphere is $4\pi r^2$ . 

• 16

• 64

• 200.96

• 401.92

We just decided the radius is 4cm. 

Find the VOLUME of the baseball, keeping in mind that the formula for surface area of a sphere is $4\pi r^3\div3$ . 

• 256

• 64

• 200.96

• 267.9

The diameter of this tennis ball is 7 cm. What is it's radius?

• 14 cm

• 7 cm

• 3.5 cm

We just decided the radius is 3.5 cm. 

Find the surface area of the tennis ball, keeping in mind that the formula for surface area of a sphere is $4\pi r^2$ . 

• 12.25

• 38.5

• 153.86

• 483.1

We just decided the radius is 3.5 cm. 

Find the VOLUME of the tennis ball, keeping in mind that the formula for surface area of a sphere is $4\pi r^3\div3$ . 

• 42.9

• 171.5

• 538.5

• 179.5