Consider a piece of convex paper quadrilateral ABCD with AB=1, BC=2, CD=3, AD=4 and ∠ ADC = 30^o

A is folded on to C forming the crease EF with E in AD and F in BC.

Determine:

• The length of the crease EF.
• The area of the quadrilateral EFCD.

EF ~= 1.65643

Posted by Charlie on 2014-11-02 22:26:15