ΟΠΊ ΡΠ½Ρ Ξ±ΠΈΡΟΡΡ ΞΉΡ (Ξ±.)
Π½ΟΟΡ ΞΉ Β’ΟΟ ββ Π½ΡβΟ Ο
the easiest way to do these would be to solve the equations. if you can solve the equation than you can solve these problems.
pi or 3.14159265359 is an irratinal decimal