π/2 = 90 degrees so the complement of π/4 is π/4.
9
pi/52 = 0.0604 to 3 sf
It is 2*pi/3.
1.0472 (rounded)
12
30
600
pi is not divided into anything - unless you specify pi/2 or pi/3.6
2
The formula for the diameter is circumference divided by pi. In this case, 3 divided by pi (= 0.95) then to get the radius just divide by 2. 0.95 divded by 2 = 0.48
Volume is 4/3 x "pi" x r3 or 4(pi)r3 divided by 3. Volume=7234.56 when pi is 3.14