Răspuns:
Explicație pas cu pas:
P patrat = 645 x 4 = 2580 cm
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P paralelogram = 2580 cm
P = 2 x (L + l)
L + l = P : 2 = 2580 : 2 = 1290 cm
L = 4l
4l + l = 1290
5l = 1290
l = 1290 : 5 = 258 cm
L = 1290 - 258 = 1032 cm
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Metoda figurativa
P paralelogram = 2580 cm
P = 2 x (L + l)
L + l = P : 2 = 2580 : 2 = 1290 cm
lungimea (L) ____ ____ ____ ____
latimea (l) ____
5 segmente = 1290 cm
1 segment = 1290 : 5 = 258 cm
latimea = 258 cm
lungimea = 258 x 4 = 1032 cm