A trapezium with it’s diagonals. Two areas are given. What faction is coloured?

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geometry puzzles to train your brain

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A trapezium with it’s diagonals. Two areas are given. What faction is coloured?

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A trapezium containing three right angles is split in two. What is the proportion of the areas yellow : blue?

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A rectangle and several triangles. The orange triangle has the same area as the green trapezium. What’s the total coloured fraction?