Area and perimeter of shapes with curved parts

Answer Key - Grade 8 Math Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

1. 1.

   Luz measures a park lawn shaped like a running track. What is its area, in square meters? Use π = 3.14.

   1114
2. 2.

   Pia measures the grass inside the school track. What is its area, in square meters? Use π = 3.14. Do not round.

   2506.5
3. 3.

   Ren puts a border all around a quarter-circle flower bed, the straight edges and the curve. How long is the border, in meters? Use π = 3.14. Do not round.

   17.85
4. 4.

   Tala puts a border all around a quarter-circle rug, the straight edges and the curve. How long is the border, in feet? Use π = 3.14. Do not round.

   28.56
5. 5.

   Zee puts a border all around a quarter-circle sandbox, the straight edges and the curve. How long is the border, in meters? Use π = 3.14. Do not round.

   10.71
6. 6.

   Ari puts a border all around a paper quarter circle, the straight edges and the curve. How long is the border, in inches? Use π = 3.14. Do not round.

   49.98
7. 7.

   Bo has a paper square with the biggest circle cut out. The square's side is 8 inches. What area of paper is left, in square inches? Use π = 3.14. Do not round.

   13.76
8. 8.

   Esme has a square card with a round hole. The square's side is 12 cm. What area of card is left, in square cm? Use π = 3.14. Do not round.

   30.96
9. 9.

   Jun has a square block top with a round label. The square's side is 20 cm. What area of the top is not covered, in square cm? Use π = 3.14.

   86
10. 10.

    Kira has a square table with a round cloth. The square's side is 14 inches. What area of the table top shows, in square inches? Use π = 3.14. Do not round.

    42.14