兩個長方形 Two Rectangles

課業 Task

構作下圖。當 P 點在甚麼位置時，兩個紅色長方形的面積會一樣？你能証實你的猜想嗎？ Construct the following figure. At what positions of P would the two rectangles have equal areas? Can you justify your observation?

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parallelograms on the same base between same parallels are equal in area

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