A Geometry Problem for ACT/SAT/PSAT Prep (Medium). Target Time. 25-40 seconds.

The figure below shows a square ABCD with sides 4 and an isosceles triangle OFE with measurements as shown. The altitude of triangle OFE is 2.

1. What is the area of the white region inside square ABCD?
2. What is the ratio of the white region to the green region?

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