I'd say its D but im not quite sure, its what makes most sense to me.
Answer:
Step-by-step explanation:
it is given that Square contains a chord of of the circle equal to the radius thus from diagram

If Chord is equal to radius then triangle PQR is an equilateral Triangle
Thus 
In triangle PQO applying Pythagoras theorem




Thus length of Side of square 
Area of square
Area of Circle
Ratio of square to the circle
Answer:
i can see it
Step-by-step explanation:
1/4 .....divide the pizza by 4 ...so you get 1/4 ...taken by each friend !