Explaining, convincing and proving
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problemIsosceles seven
Is it possible to find the angles in this rather special isosceles triangle?
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problemCounting stick conjectures
How many rectangles can you see? Are they all the same size? Can you predict how many rectangles there will be in counting sticks of different lengths? -
problemTriangle in a square
Do you agree with Badger's statements? Is Badger's reasoning watertight? Why or why not? -
problemDiagonally square
Ayah conjectures that the diagonals of a square meet at right angles. Do you agree? How could you find out?
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