For numbers 19-20, use the problem below. Corinne planted dwarf crotons around her circular flower garden which has a diameter of 5 meters. How many meters did she plant with dwarf crotons?
19. What is the radius of the circular garden?
*
1 point
A. 5 metres
B. 2.5 meters
C. 10 meters
D. 12.5 meters
20. How many meters did Corinne plant with dwarf crotons?
*
1 point
A. 15.7 meters
B. 31.4 meters
C. 12.5 maters
D. 30.9 meters


Sagot :

PROBLEM:  Corinne planted dwarf crotons around her circular flower garden which has a diameter of 5 meters. How many meters did she plant with dwarf crotons?

QUESTION 19: What is the radius of the circular garden?

ANSWER: B. 2.5 meters

  • Simply divide the diameter to 2.

QUESTION 20: How many meters did Corinne plant with dwarf crotons?

ANSWER: A. 15.7 meters

  • FORMULA: C = 2πr
  • C: circumference
  • π: pi (Let's estimate to 3.14)
  • r: radius (to get raidus from diamater, check the former question)

  • C = 2 · π · 2.5
  • C = 6.28 · 2.5
  • C = 15.7m