How many right angles can you make using two sticks?
Use your knowledge of angles to work out how many degrees the hour
and minute hands of a clock travel through in different amounts of
Chippy the Robot goes on journeys. How far and in what direction
must he travel to get back to his base?
How many different triangles can you make on a circular pegboard that has nine pegs?
Can you find all the different triangles on these peg boards, and
find their angles?
Use the interactivity to investigate what kinds of triangles can be
drawn on peg boards with different numbers of pegs.
Vidhya from Kensri School in India sent in a very well reasoned solution for this problem.
Go to last month's problems to see more solutions.
Suggestions for worthwhile mathematical activity on the subject of
angle measurement for all pupils.
A virtual geoboard that allows you to create shapes by stretching rubber bands between pegs on the board. Allows a variable number of pegs and variable grid geometry and includes a point labeller.
Take it in turns to make a triangle on the pegboard. Can you block your opponent?