Answer:
The circumference of the circle is approximately 19.8 centimetres.
Step-by-step explanation:
If the square has an area of 40 square centimetres, that means that the side length of the square is √40, or 2√10
The side length will be the diameter of the circle. Which is all we need to find its circumference. The circumference of a circle is equal to pi times its diameter, so we say:
c = πd
c = 3.14 × 2√10
c = 6.28√10
c = 6.28 × 3.16
c = 19.8
