The diagram shows a semi-circle and an isosceles triangle which have equal areas. What is the value of tan x?
Weekly Problem 21 - 2009
What is the angle between the two hands of a clock at 2.30?
How do you know whether you will reach these numbers when you count in steps of six from zero?
Ayah conjectures that the diagonals of a square meet at right angles. Do you agree? How could you find out?
In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?
Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?
Andy wants to cycle from Land's End to John o'Groats. Will he be able to eat enough to keep him going?
This article looks at levels of geometric thinking and the types of activities required to develop this thinking.
