Step by step explanation:
To turn degrees into radian yuo have to multiply for the conversion factor, remember that pi radians are equal to 180 degrees, so:

And for the problem we can first find the total area, if 75° is 12cm^2. How much do 360° correspond to?

Now we can use the area formula:



![r=\sqrt[]{(57.6)/(\pi)}](https://img.qammunity.org/2023/formulas/mathematics/college/d2fyrijxcgp62t6zgkarj67rvl7n2wm0ng.png)

The radius is approximately 4.3 cm