" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2π=πr45°:180°/:π
2=r:4
r=8
8*2π = 16π - długość obwodu
2πr = 16π | /2π
r = 8
L = 2 *pi
Korzystamy ze wzoru L =x*r
r =L : x =( 2*pi) : (pi/4) = (2*pi) *(4/pi) =8
Odp. r = 8 cm