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Quadrilaterals
Are these all squares?
OK, they are all fixed images and they all look like squares, but are they really? Try again:

Please enable Java for an interactive construction (with Cinderella).

Were you right? red: Choose... square rectangle parallelogram rhombus kite trapezium right-angled plain orange: Choose... square rectangle parallelogram rhombus kite trapezium right-angled plain green: Choose... square rectangle parallelogram rhombus kite trapezium right-angled plain pink: Choose... square rectangle parallelogram rhombus kite trapezium right-angled plain blue: Choose... square rectangle parallelogram rhombus kite trapezium right-angled plain yellow: Choose... square rectangle parallelogram rhombus kite trapezium right-angled plain black: Choose... square rectangle parallelogram rhombus kite trapezium right-angled plain purple: Choose... square rectangle parallelogram rhombus kite trapezium right-angled plain

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