Posted by jani on Wednesday, October 6, 2010 at 11:57am.
ahh, that's better
make a sketch of a line and label point A, B, C, and D
using CD : AB = 5:2
label AB = 2x and CD = 5x , giving you the 5:2 ratio
From AC = 25 you can now label BC as 25-2x
From BD = 46 you can label BC as 46-5x
so obviously 25-2x = 46-5x
x = 7
sub back in either of BC expressions, to get BC = 11
thanks :D
given formula fro "c" : A= one half (h b + b c)
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