Odpowiedzi

2009-12-01T17:45:54+01:00
A=2 ⅚m
b=2 ⅚ + 13/15m
c=xm
2 ⅚ + 2 ⅚ + 13/15 + x = 9 2/15
x = 9 2/15 - 2⅚ - 2⅚ - 13/15
x= 2 ⅗m

Odp. Trzeci bok wynosi 2⅗m.
2009-12-01T17:49:24+01:00
Obw. = 9 2/15 m = 9 8/60m
a = 2 5/6 m = 2 50/60 m
b = o 13/15 m dłuższy = o 52/60 m dłuższy
c = ?

b = 2 50/60 m + 52/60 m = 2 102/60 m = 3 42/60 m
c = 9 8/60 m - 2 50/60 m - 3 42/60 m =
= 8 68/60 m - 2 50/60 m - 3 42/60m =
= 6 18/60 m - 3 42/60 m =
= 5 78/60 m - 3 42/60 m =
= 2 36/60 m = 2 3/10 m = 2,3 m
c= 2,3 m
2009-12-01T23:29:16+01:00
Ob=9 2/15
a=2 5/6
b=2 5/6 + 13/15
c=?

b= 2 5/6 + 13/15=2 25/30 + 26/30= 2 51/30= 3 21/30= 3 7/10
c= 9 2/15-(2 5/6+3 7/10)=9 4/30-(2 25/30+3 21/30)=9 4/30-5 46/30=9 4/30- 6 16/30=8 34/30-6 16/30=2 18/30= 2 3/5

Odp: bok C ma długość 2 3/5
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