The area of a circle is 154cm calculate the radius

Answer 1

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.