Concepts you need to know:

Square Numbers


9 is a square number as 3x3 = 9
The square root of 9 is 3.

The following are a list of square numbers - 4, 9, 16, 25, 36, 49...

Area of a parallelogram:


para.jpg

Area of a triangle:

area-triangle-base-height.gif
Here are some worksheets for practise:

http://www.mathworksheets4kids.com/triangles/area-fig.pdf

http://www.mathworksheets4kids.com/area/parallelogram-area-fig.pdf



external image trapezoidr.gif

REVIEW QUESTIONS

Jason has 36m of fencing. Here are 3 different ways he can fence his pool:
a) Make a square fence.
b) The length of the fence is twice its width.
c) Jason only needs fencing on three sides. The unfenced side is 8m.
For each of the above:
  1. Find the dimensions of the region fenced.
  2. Find the area of the region fenced.

The drama club needs a plywood box with these dimensions: 70cm by 40cm by 50cm.
It will be used as a prop in a play.
a) How much plywood is needed?
b) Another box is built with each dimension twice as great. How much plywood is needed for this box?
c) A sheet of plywood has an area of 2.4 m squared. How many sheets will be needed for both boxes.