-- Circumference of the circle = (pi) x (radius)
-- length of the intercepted arc/circumference = degree measure of the central angle/360 degrees
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A circle is divided into 360° and each of them is 1° ■
The circumference of a circle is 360 degrees so measure out five 72 degree arcs and join them to the centre of the circle.
180 degrees, if you mean a half circle
For A+ it's 20
Length of arc: (60/360)*2*3.14*16 = 16.747 feet rounded to 3 decimal places