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d2 = 19cm - 5cm = 14cm
P= 1/2 * d1 * d2 = 133cm²
2. d1 = 12cm
d2 = 16cm
h = 9,6cm
P=1/2 d1 * d2 = 96cm
P = 1/2 a * h
96 = 1/2 * a * 9,6 / : 9,6
1/2a = 10 /*2
a = 20cm
p(pierwsza przekątna)=19cm
q(druga przekatna) = 19cm-5cm=14cm
P= ?
P= 1/2 p*q
P= 1/2 19cm * 14cm
P=133cm2
2 Zad.
p=12 cm
q=16 cm
h=9,6 cm
Bok rombu ?
P= 1/2 12cm*16cm
P= 96 cm2
P = 1/2 a * h
96 = 1/2 * a * 9,6 / : 9,6
1/2a = 10 /*2
a = 20cm