Answer:
<u>d = 2r or d = C/π</u>
Diameter is equal to two times the radius or Circumference/π
<u>C = 2πr</u>
Circumference is equal to two times π multiplied the radius
<u>A = π * r²</u>
The area of the circle equals to π multiplied by the radius squared
Step-by-step explanation:
Let's find the formulas for d, C and A
d = diameter
C = Circumference
A = Area
r = radius
π ≅ 3.1416
d = 2r or d = C/π
Diameter is equal to two times the radius or Circumference/π
C = 2πr
Circumference is equal to two times π multiplied the radius
A = π * r²
The area of the circle equals to π multiplied by the radius squared
