A regular octagon A B C D E F G H has an area of one square unit. What is the area of the rectangle A B E F ?
Answer Choices
A. 1-\dfrac{\sqrt{2}}{2}
B. \dfrac{\sqrt{2}}{4}
C. \sqrt{2}-1
D. \dfrac{1}{2}
E. \dfrac{1+\sqrt{2}}{4}
A regular octagon A B C D E F G H has an area of one square unit. What is the area of the rectangle A B E F ?
Answer Choices
A. 1-\dfrac{\sqrt{2}}{2}
B. \dfrac{\sqrt{2}}{4}
C. \sqrt{2}-1
D. \dfrac{1}{2}
E. \dfrac{1+\sqrt{2}}{4}