中一數學第十課：坐標【上】(F.1 Math. Ch10：Coordinates Part 1)

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In the figure, points E, F and G are reflected with respect to a vertical line L to points E^ prime , F^ prime and G' respectively. L cuts the x-axis at Q. (a) Find the distance between E and E^ prime . (b) Find the coordinates of Q. (c) Find the coordinates of F' and G^ prime .

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How to do this question

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想問下最後個一題計每個三角形每條線個陣時點知幾時用x幾時用y?

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當要計垂直線嘅長度時就將兩點嘅 Y component 相減，當要計水平線嘅長度時就用兩點嘅 X component 相減

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