Question

A = 1.4 cm?
Calculate the radius of the circle.

Answer 1

.67 = r

Explanation:

The area of a circle is found by

A = pi r^2

1.4 = pi r^2

We can approximate pi by 3.14

1.4 = 3.14 ( r^2)

Divide by 3.14

1.4/ 3.14 = 3.14 r^2/3.14

.445859873 = r^2

Take the square root of each side

sqrt(.445859873) = sqrt(r^2)

.667727394 = r

Rounding to the nearest hundredth

.67 = r