Sheet # 55 Critical Thinking
Name: _____________________ Date_____________
Show and explain your work. Draw pictures or make tables to explain your answer.
Four congruent circles are packed into a square with side 10 cm. What is the area of the shaded region?
Answers for sheet # 55
Diameter of each circle = 5 cm (half of the side)
Area of each circle = 3.14 x 2.5 x 2.5 = 19.6 sq. cm
Area of four circles = 78.4 sq cm
Area of the square = 100 sq cm
Area of the shaded region = 100 - 78.4 = 21.6 sq. cm