9514 1404 393
Answer:
- area: 78.5 square units
- circumference: 31.4 units
Explanation:
The diameter is the difference between x-coordinates of the end points of the horizontal line through the center:
d = 12 -2 = 10
The radius is half that, so is ...
r = d/2 = 10/2 = 5
The area is given by ...
A = πr^2 = π(5^2) = 25π ≈ 78.5 . . . . square units
The circumference is given by ...
C = πd = 10π ≈ 31.4 . . . . units