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The formula for the area of a circle is A = πr^2, where A is the area and r is the radius.
We can solve for the radius by rearranging the formula:
r = √(A/π)
Given that the area is 78.5cm^2, we can substitute this value into the formula:
r = √(78.5/π) ≈ 5.01cm
Finally, we can calculate the diameter by doubling the radius:
d = 2r ≈ 10.02cm
Therefore, the diameter of the circle with an area of 78.5cm^2 is approximately 10.02cm.
What else can I help you with?
Find the circumference of the circle whose diameter are : 9.1?
1.9 and the diameter is ten
What method can be used to find the radius of a circle whose diameter is 15?
radius = diameter/2
Find the area of a circle whose diameter is 10 cm?
5,2
What formula will you use to find the circumference of a circle whose diameter is 2.2h?
Circumference of a circle = pi*diameter or 2*pi*radius
Find the area of a circle whose diameter is 32 feet?
A = 804 square feet.
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10 cm
Find the radius of a circle whose diameter is 7 inches?
Radius = 1/2 of diameter = 7/2 = 3.5 inches
Find the diameter of a circle whose circumference is 61.89?
Easy to do. Just divide the circumference by Pi (about 3.1416) to determine the diameter:61.89 / 3.1416 = about 19.7 diameter
What is the diameter of a circle whose circumference is 314?
The diameter of a circle whose circumference is 314 is about 1 (99.95).
How do you find the raduis of a circle whose diamter is 20?
Radius = Diameter/2 so if diameter = 20 Radius = 20/2 = 10
Find the circumference of a circle whose diameter is 10 yards?
Circumference = (pi) x (diameter) = 10 pi = 31.416 yards (rounded)
What is the radius of a circle whose diameter is 28 cm?
The radius of a circle is half the length of its diameter. Therefore, to find the radius of a circle with a diameter of 28 cm, you would divide the diameter by 2. So, the radius of the circle would be 28 cm divided by 2, which equals 14 cm.
