Answer and Explanation
Your Answer is
Correct Answer is C
Explanation
The area of the shaded triangle is 5*5/2=12.5; the area of the pentagon is 10*10-12.5=87.5, so the ratio of the two is 1:7
49. Square ABCE, shown below, has a side length of 10 inches. Point D is the midpoint of CE，and F is the midpoint of AE. What is the ratio of the area of △DEF, shown shaded, to the area of pentagon ABCDF?
