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In the diagram, triangle ABE, triangle BCE and triangle CDE are right-angled, with Angle AEB= Angle BEC= Angle CED=60 degrees, and AE=25. Find the length of DE.

 

 Dec 5, 2021
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AE = 25

BE = 25(cos60) = 12.5

CE = 12.5(cos60) = 6.25

DE = 6.25(cos60) = 3.125  or   31/8

 Dec 7, 2021

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