Obwód rombu wynosi 40cm. Oblicz wysokość tego rombu jeżeli jedna z przekątnej ma 8cm a druga 6cm. ( nie obliczaj pola) x
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Ob = 40cm
Ob = 4 * a ----- wzór na obwód rombu o boku a
40 = 4 * a
a = 40 : 4
a = 10cm ---- bok rombu
P = 1/2 * d1 * d2 ----- wzór na pole rombu
d1 = 8cm
d2 = 6cm
P = 1/2 * 8 * 6=
P = 4 * 6
P = 24cm^2 ------ pole rombu
P = a * h --------- wzór na pole rombu gdy mamy bok i wysokosc
24 = 10 * h
24 : 10 = h
h = 2,4cm -------- odpwoiedź
Ob = 4a
a = Ob/4
a = 40cm/4 = 10cm
P = ef/2
P = ah
ef/2 = ah
h = ef/2a
h = 8cm x 6cm/2 x 10cm = 48cm²/20cm = 2,4cm
Odp. Wysokość rombu to 2,4cm
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