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#1 Re: Help Me ! » 3d plane in a cube » 2016-10-15 23:36:33

kk63353

bob bundy wrote:

SA = 10/3
From the second pair SA/SD = AQ/RD
=> RD = 1 x (5+10/3)/(10/3) = (15+10)/10 = 25/10 = 2.5

Can't we just say SA/SD=2/5=AQ/RD, so since AQ=1, RD=5/2?

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