In the diagram below, ABCD and DEFG are congruent squares, and angle CDG is 60°.

What is angle ACF?

(In reply to Solution by Rosy)

If this were an accurate scale diagram for the figure, given that angle CDG = 60 degrees, then -- as you say -- we could simply observe that ACF is a right angle, so 90 degrees QED.

I suspect Charlie is somehow fooling us ??

Posted by ed bottemiller on 2009-04-20 17:35:07