The radius of a circle is half the diameter.
with a big tape measure
180 - 58 = 122
measure it÷ it by 2.
Measure the diametre of the circle and divide by two to give the radius.
Gallium has an atomic radius of 135 picometers.
Area = pi*122
The radius of a circle is half the diameter.
122 degrees
measure from the middle out to one side
122 x pi = 452.39
116 pm
with a big tape measure
180 - 58 = 122
measure it
7.4
By measuring it....