CIRCLES: CIRCUMFERENCE AND AREA REVIEW



Which is closest to the total area of the shape?30480083820 Shape:______Area:________ Shape:_____Area:______A. 31.4 in?C. 39.25 in?B. 131.4 in?D. 139.25 in? Which method could be used to determine the area of the shaded region?4762501270Subtract the area of the circle from the area of the square.Subtract the area of the square from the area of the circle.Subtract ? the area of the square from the area of the circle.Subtract ? the area of the circle from the area of the square. One circle has a radius of 20 inches, and another circle has a radius of 10 inches. What is the approximate difference between the areas of the 2 circles? 300 in?C. 942 in?314 in?D. 1256 in? What is the approximate area of the shaded region?304800113030 90 cm?270 cm?314 cm?1256 cm?**What is the perimeter of the shaded region? 62.8 cmC. 71.4 cm60 cmD. 31.4 cm The circle shown has a radius of 4cm. Which of the following is closest to the area of the circle?198120151765 64 cm?24 cm?46 cm?51 cm? Which equation could be used to find the area of the unshaded region?35378229961A = π(12?)A = π(39?) - π(12?) A = π(39?) - π(27?)A = π(51?) - π(37?)Radius of Large circle_____Area of large circle ____x___x___Radius of small circle ________Area of small circle ___x___x___ What smaller shapes could you divide the regular octagon into to make it easier to calculate the area?247650-907 2 trapezoids and 1 rectangle.3 squares1 trapezoid, 1 pentagon, and 1 square2 rectangles and 1 square. Which shape has the largest area?1981205715Figure IFigure IIFigure IIIFigure IV A circle has a diameter of 16 m. About how much is the circumference of the circle? 25 m 50 m70 m201 m A circle has a radius of 5 m. What is the circumference of the circle? 31.4 m78.5 m15.7 m10 mA circle has a circumference of 6 m. Which expression could be used to determine the radius? 6π B. 12π C. 6 π D. 62π A basketball has a circumference of 30 inches. Which expression could be used to determine the diameter of the basketball? 15πB. 30π C. 302π D. π30 A mechanical pencil lead refill has a diameter of .7mm. About how much is the area of the top of the mechanical pencil lead refill? 3.14 mm?4 mm?.4 mm?2 mm? A round tablecloth has a radius of 3 ft (or 1 yard). What is the area of the tablecloth? 7.065 ft?9.42 ft?6 ft?28.26 ft? What is the height, h, of a trapezoid with bases of 10 yd and 15 yd and an area of 100 yd? ? h= 10 yardsh= 15 yardsh= 4 yardsh= 8 yards A triangle with an area of 30 cm? has a height of 15 cm. What is the base length of the triangle? 2 cmC. 20 cm4 cmD. ? cmDRAW IT!!!!!9. 10. 11. 12. 13. 14. 15. 16. ................
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