You may also like

problem icon

Cut Cube

Find the shape and symmetries of the two pieces of this cut cube.

problem icon

Mean Geometrically

A and B are two points on a circle centre O. Tangents at A and B cut at C. CO cuts the circle at D. What is the relationship between areas of ADBO, ABO and ACBO?

problem icon

Cocked Hat

Sketch the graphs for this implicitly defined family of functions.


Stage: 5 Challenge Level: Challenge Level:1

Why do this problem?
A simple trig. calculation involving cot and tan.

Key question
How many squares in each ring? So what are the angles?

Can you find any right angled triangles?