A designer is making a pattern with right angled isosceles triangles. The sides that form the right angle in the right angled isosceles triangles are all of side length 6 cm. The designer has a selection of different coloured right angled isosceles triangles which he wishes to stick onto a square whose side length is 72 cm. How many of these coloured triangles will fit onto the square, without overlapping?

When dealing with circles, you will need to use π (pi). This is a mathematical constant used to calculate the circumference and the area of circles. Remember it to three decimal places at least.

Here’s pi to 100 decimal places, just in case you'd like to memorise it:
3.141592653589793238462643383279502884197169399375105820974
9445923078164062862089986280348253421170679

Related Test:

11 Plus (11+) Maths Practice Test: Perimeter and Area (Very Easy)

11 Plus (11+) Maths Practice Test: Perimeter and Area (Easy)