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📐 Area Architect
HK Primary 5 · Area of triangle, parallelogram & trapezium
Shape Builder
Choose a shape, then drag the orange dots or use the sliders to change its base and height. The grid squares are 1 cm each — watch the area formula update live.
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5
Your turn
Work out the area of each shape in cm², type your answer, then press Check. Press New questions for a fresh set.