Przekątne rombu mają dlugość 9cm i 7 cm, długość ma 6 cm. Oblicz obwód romu.
d1 = 9cm
d2 = 7cm
h = 6cm
P = 1/2 * d1 * d2 = 1/2 * 9cm * 7cm = 31,5cm^2
P = a * h
31,5 = a * 6
a = 31,5 : 6
a = 5,25cm ---- bok rombu
Ob = 4 * a = 4 * 5,25cm = 21cm ---- odpowiedź
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d1 = 9cm
d2 = 7cm
h = 6cm
P = 1/2 * d1 * d2 = 1/2 * 9cm * 7cm = 31,5cm^2
P = a * h
31,5 = a * 6
a = 31,5 : 6
a = 5,25cm ---- bok rombu
Ob = 4 * a = 4 * 5,25cm = 21cm ---- odpowiedź