3.1
phi = 1.618 to 3 dp pi = 3.142 to 3 dp
Circumference = pi*d A very rough estimate would be to take pi = 3 and d = 16 giving 48 cm A more precise answer would be pi = 3.14, d = 16.3 and circumference = 51.182 cm or 51.2 cm to 1 dp Taking a still more accurate value of pi gives the circumference of 51.21 cm, still 51.2 cm when rounded to 1 dp.
To 200 dp it is 3.14159265358979323846264338327950288419716939937510 58209749445923078164062862089986280348253421170679 82148086513282306647093844609550582231725359408128 48111745028410270193852110555964462294895493038196 You can find pi to more than 10 trillion digit at the attached link.
20.41/pi = 6.496704777 or 6.5 inches to 1 dp
pi value= 1
Assuming the question is about the square root of pi, the answer is 1.772454 to 6 dp.
25.7831 (to 4 dp)
The value of g when t is equal to 1/pi is approximately 9.81 m/s2.
tan (pi) / 1 is zero. tan (pi / 1) is zero.
Circumference = pi*diameter = pi*1.1 = 3.46 cm (to 3 dp)
radius = (14*pi)/(2*pi) = 7 area = pi*72 = 153.938 square units to 3 dp
Yes there once was a US state that tried to legislate the value of pi