1. Starter Questions Q1. 35% of 360 Q2. Calculate 5 + 6 x 7
Q3. Expand 2( y – 5 ) 1

2. Volume of Solids Prisms Learning Intention
To understand the prism formula for
calculating volume.

3. Volume of Solids Definition : A prism is a solid shape with
uniform cross-section
Hexagonal Prism
Cylinder
(circular Prism)
Triangular Prism
Pentagonal Prism
Volume = Area of Cross section x length

4. Sometimes called the altitude
Any Triangle Area
h = vertical height
Sometimes called the altitude h b 4

5. Any Triangle Area
Example 1 : Find the area of the triangle.
6cm
8cm 5

6. Volume of Solids Definition : A prism is a solid shape with
uniform cross-section
Q. Find the volume the triangular prism.
Triangular Prism
Volume = Area x length
= 20 x 10 = 200 cm3
10cm
20cm2

7. Volume of a Triangular Prism
Working
Triangle Area =
= 2 x4 = 8 cm2
4cm
Volume = Area x length
= 8 x 10 = 80cm3
10cm
4cm

8. Find the volume of the triangular prism.
Example
Find the volume of the triangular prism.
Working
Triangle Area =
= 3 x 3 = 9 cm2
Volume = Area x length
= 9 x 30 = 270cm3
6cm
3cm
30cm
Total Area
= = 132cm2

9. Volume of Solids
Now try Ex 5.1
Pg 30 Ch 2