What is the diameter of a circle if its length is 13.4 cm? What is the radius of a circle if its length is 56.32 cm?
| June 21, 2021 | education
It is known that the circumference is calculated by the formulas:
C = 2Пr (if the radius is known);
C = Пd (if the diameter is known).
1) Calculate the diameter of a circle if its length is 13.4 cm:
13.4cm = 3.14 * d.
d = 13.4 / 3.14.
d = 4.27cm.
2) Calculate the radius of the circle if its length is 56.32 cm:
56.32cm = 2 * 3.14 * r.
r = 56.32 / (2 * 3.14).
r = 56.32 / 6.28.
r = 8.97cm.
Answer: d = 4.27cm; r = 8.97cm.
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