# Volume of Prisms I

Lesson

## Revision of Volume of Prisms

We have been learning about the volume of objects, particularly rectangular prisms, and then prisms more broadly.

Volume of Prism

$\text{Volume of any prism }=\text{Area of Base }\times\text{Height }$Volume of any prism =Area of Base ×Height

$V=A_b\times h$V=Ab×h

## Units for Volume

It is probably worthwhile to remind ourselves of the units that are often used for calculations involving volume.

Units for Volume

cubic millimetres = mm3

(picture a cube with side lengths of 1 mm each - pretty small this one!)

cubic centimetres = cm3

(picture a cube with side lengths of 1 cm each - about the size of a dice)

cubic metres = m3

(picture a cube with side lengths of 1 m each - what could be this big?)

AND to convert to capacity - 1cm3 = 1mL

#### Worked Examples

##### QUESTION 1

Find the volume of the cube shown.

##### QUESTION 2

Find the volume of the rectangular prism shown.

##### QUESTION 3

Find the volume of the prism by finding the base area first.

### Outcomes

#### GM5-4

Find the perimeters and areas of circles and composite shapes and the volumes of prisms, including cylinders