Acone has a diameter of 9 inches and a height of 12 inches. find the volume of the cone to the nearest tenth.

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find the area of a circle with d = 19 km. use 3.14 for ππ. round to the nearest tenth.

area is the number of cubic units needed to fill a space. true or false

1)
The formula for calculating the cone volume is: 


Data:
V (volume) = ?
h (height) → h = 12 in
d (diagonal) = 9 in , if: d = 2*r , soon: 9 = 2*r → 2r = 9 → r = 9/2 → r = 4.5 in
Use: 

Solving:






2)
The circle area formula is: 

Data:
A (area) = ?
d (diagonal) = 19 Km , if: d = 2*r , soon: 19 = 2*r → 2r = 19 → r = 19/2 → r = 9.5 Km
Use: 

Solving:





3) False, because it's the volume, the number of cubic units needed to fill a space.