At the time of writing the hour and minute hands of my clock are at
right angles. How long will it be before they are at right angles
Derive a formula for finding the area of any kite.
A circle with the radius of 2.2 centimetres is drawn touching the sides of a square. What area of the square is NOT covered by the circle?
Chelsea from the Thomas Deacon Academy
suggested a strategy for tackling this problem: