In △abc a line segment de connects sides ab and bc so that de ∥ ac . the lengths of the sides of △dbe are four times shorter than the lengths of the sides of △abc. what is the area of △abc if the area of a trapezoid adec is 30cm^2?

  32 cm^2

Step-by-step explanation:

The sides of ∆DBE or 1/4 of the sides of ∆ABC, so its area is (1/4)^2 = 1/16 of the area of ∆ABC. The trapezoid's area is then 1 -1/16 = 15/16 of the total area of ∆ABC. Said another way, the area of ∆ABC is 16/15 times the area of the trapezoid.

  Area ∆ABC = (16/15)·(30 cm^2) = 32 cm^2

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