Question

What is the approximate area of the shaded region?
Image: http://lv.k12.com/mediaFiles/Ninth_Grade/Math/Unit17525/Lesson68695/VHS_PA_S2_03_L212_L312_LQ_Q1.gif

A.178.5 square centimeters

B.100 square centimeters

C.78.5 square centimeters

D.21.5 square centimeters

Answer 1

area of square minus area of the circle
radius of circle = 1/2 the diameter = 1/2(10) = 5
area of a circle = pi*r^2 pi = 22/7 so area = (22/7)*(5)^2= 78.5
area of square = length squared length = 10 so area = 10^2 = 100
shaded = square - circle
= 100 - 78.5 =
unit of measure for area is square centimeters

Answer 2

So, it'd be 21.5?

Answer 3

yes