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27 July, 10:32

Triangle ABC, ∠ B is the right angle, AB = 36 cm, and BC = 28 cm. If the similar figure DEF, DE = 9 cm what is the area of DEF?

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  1. 27 July, 11:41
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    AB = 36 cm

    BC = 28 cm

    Since they are similar figures:

    36/28 = 9/EF

    36EF = 28*9

    EF = 252/36 = 7 cm

    Finding the area:

    Area = 1/2 * DE * EF

    Area = 1/2 * 9 * 7

    Area = 31.5 cm^2
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