C. 74.86 cm
To find the radius of a circle when given the area, use the formula:
Area of a circle = πr^2
78.5 = 3.14r^2
r^2 = 78.5 /3.14
r^2 = 25
r = √25
r = 5
Therefore, the radius of the circle is 5 cm.
If the area of a circle is 78.5 cm squared, what is the radius of the circle? Use 3.14 for pi
A. 25 cm
B. 5 cm
C. 74.86 cm
D. 7 cm
1 answer
1 answer