Răspuns :
ma=21,52
a=20,54
ma=(a+b)/2
21,52=(20,54+b)/2
20,54+b=21,52*2
b=43,04-20,54
b=22,5
a=20,54
ma=(a+b)/2
21,52=(20,54+b)/2
20,54+b=21,52*2
b=43,04-20,54
b=22,5
(a+b):2=21,52
20,54+b:2=21,52
20,54+b=21,52*2
20,54+b=43,04
b=43,04-20,54
b=22,5
(20,54+22,5):2=43,04:2=21,52
20,54+b:2=21,52
20,54+b=21,52*2
20,54+b=43,04
b=43,04-20,54
b=22,5
(20,54+22,5):2=43,04:2=21,52