66+66 possibly .....the only thing i can come up with
7b / 12 = 4.2
multiply both sides by 12
7b = 50.4
divide both sides by 7 to isolate b
b = 7.2
Answer:
diagonals bisect each other equally in rectangle
then use the concept of vertically opposite angles
Hi :) I'm guessing the shaded region is the region inside the rectangle but outside the circle.
To solve this problem, you need to find the area of the rectangle and area of the circle. Then subtract the circle's area from the rectangle's.
Area of a rectangle: length × width
The problem already tells you the area of the rectangle, because it says it is an 11 × 11 rectangle.
(11)(11) = 121
Area of rectangle: 121 units²
Area of a circle:

Plug in 5 for the radius r.

= 78.5
Area of circle: 78.5 units²
Now subtract 78.5 from 121.
121 - 78.5 = 42.5
The area of the shaded region is 42.5 units².