Was ist der Durchmesser eines Kreises, dessen Umfang 5 ist?

#"the circumference (C) of a circle is"#

#•color(white)(x)C=pidlarrcolor(blue)"d is the diameter"#

#"here "C=5#

#rArrpid=5#

#"divide both sides by "pi#

#(cancel(pi) d)/cancel(pi)=5/pi#

#rArrd=5/pi~~1.59" to 2 dec. places"#