The area of a circle is 154cm calculate the radius
To find the radius of a circle given its area, we use the formula:
A = πr²
where A is the area and r is the radius.
In this case, we know that the area is 154cm, so we can plug that in:
154 = πr²
To solve for r, we need to isolate it on one side of the equation. We can start by dividing both sides by π:
49.02 = r²
Now we can take the square root of both sides to get rid of the exponent:
r = ±7
Since the radius of a circle cannot be negative, we can disregard the negative solution, leaving us with:
r = 7 cm
So the radius of the circle is 7 cm.