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13 November, 17:36

I have 2 similar right angle triangles, CDE and ADG. The length of CDE's hypotenuse is 1/3 the length of ADG's hypotenuse. The area of CDE is 42. What is the area of ADG?

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  1. 13 November, 18:32
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    lengths are in ratio 1:3

    areas are in ratio

    1 : 3 ² = 1: 9

    area of ADG = 9 x 42 = 378
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