Odpowiedź :
Obwod koła = 2πr
a) 2πr = 3π
2r = 3
r = 1,5
b)
2πr = 3π/4
8πr = 3π
8r = 3
r = 3/8 = 0,375
a) 2πr = 3π
2r = 3
r = 1,5
b)
2πr = 3π/4
8πr = 3π
8r = 3
r = 3/8 = 0,375
a)
2TTr=3TT /:TT
2r=3 /:2
r=3/2=1.5
b)
2TTr=3TT/4 /×4
8TTr=3TT /:TT
8r=3 /:8
r=3/8
2TTr=3TT /:TT
2r=3 /:2
r=3/2=1.5
b)
2TTr=3TT/4 /×4
8TTr=3TT /:TT
8r=3 /:8
r=3/8