
Quadrilaterals
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problem
Poly plug rectangles
The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?
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problem
Seeing squares
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.
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problem
Opposite vertices
Can you recreate squares and rhombuses if you are only given a side or a diagonal?
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problem
Outside the nonagon
Weekly Problem 44 - 2010
Extend two of the sides of a nonagon to form an angle. How large is this acute angle? -
problem
Quad match
A task which depends on members of the group noticing the needs of others and responding.
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problem
Making rectangles
A task which depends on members of the group noticing the needs of others and responding.
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problem
Square pair
Explore the shape of a square after it is transformed by the action of a matrix. -
problem
Unusual quadrilateral
This quadrilateral has an unusual shape. Are you able to find its area? -
problem
Bicentric quadrilaterals
Investigate the properties of quadrilaterals which can be drawn with a circle just touching each side and another circle just touching each vertex.