ANWSER both pls for .. :)

What percent of the circle below is shaded?

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm

Find the value of x in the diagram below. select the best answer from the choices provided