1. Compiled by Mr. Lafferty Maths Dept.
Net and Surface Area
Surface Area
Net of Solids
5-Apr-19
Compiled by Mr. Lafferty Maths Dept.

2. Face Edges and Vertices
Don’t forget the faces edges and corners we can’t see at the back
Face Edges and Vertices S4
The shape below is called a rectangular prism.
It is made up of FACES, EDGES and VERTICES.
Edges are where the two faces meet (lines)
Faces are the
sides of a shape
(surface area)
Vertices where lines meet (corners)
5-Apr-19
Compiled by Mr. Lafferty Maths Dept.

3. Face Edges and Vertices
Calculate the number of faces edges and vertices for a cuboid.
Face Edges and Vertices S4
6 faces
12 edges
Front and back are the same
8 vertices
Top and bottom are the same
Right and left are the same
5-Apr-19
Compiled by Mr. Lafferty Maths Dept.

4. Find the total surface area of the rectangular prism.
Example
Find the total surface area of the rectangular prism.
Working S4
Front Area = b x h
= 5 x 4 =20cm2
Top Area = b x h
= 5 x 3 =15cm2
4cm
Side Area = b x h
= 3 x 4 =12cm2
3cm
5cm
Total Area =
= 94cm2
Front and back are the same
Top and bottom are the same
Right and left are the same
5-Apr-19
Compiled by Mr. Lafferty Maths Dept.

5. Find the total surface area of the triangular prism.
Example
Find the total surface area of the triangular prism.
Working S4
Triangle Area =
= 2 x3 =6cm2
Rectangle 1 Area = b x h
= 3 x10 =30cm2
4cm
5cm
Rectangle 2 Area = b x h
3cm
10cm
= 4 x 10 =40cm2
Rectangle 3 Area = b x h
2 triangles the same
= 5 x 10 =50cm2
1 rectangle 3cm by 10cm
Total Area
= = 132cm2
1 rectangle 4cm by 10cm
1 rectangle 5cm by 10cm
5-Apr-19
Compiled by Mr. Lafferty Maths Dept.

6. These examples involved finding the TOTAL SURFACE AREA but we also need to discuss LATERAL SURFACE AREA!
The only difference between lateral and total is that total includes EVERYTHING but lateral excludes the bases!
So, revisit the examples and find the lateral surface area by intentionally excluding the area of the bases.

7. Lastly, The same approach used to find the Total and Lateral Surface Area for Prisms can also be used for Pyramids!