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Calculati perimetrul unui poligon convex cu laturile de: a) 7 intreg si 1 pe 3 cm; 6,(2) cm; 6 cm; 7,(8) cm; va rog mult.

Răspuns :

[tex]7 \frac{1}{3} = \frac{7*3+1}{3} = \frac{22}{3} [/tex]  cm

[tex]6,(2)= \frac{62-6}{9} = \frac{56}{9} [/tex]  cm

6 cm

[tex]7,(8)= \frac{78-7}{9}= \frac{71}{9} cm[/tex]


[tex]\frac{22}{3}+\frac{56}{9} +6+\frac{71}{9}= \frac{22*3+56+6*9+71}{9} = \frac{66+56+54+71}{9}= \frac{247}{9} =27,(4) cm[/tex]