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20 * 2 = 40
40 : 16 = 2,5
Spr:
16 * 2,5 :2=40 :2 =20
Odp: wysokość wynosi 2,5 cm
b) P= (a+b)*h:2
5 +7= 12
48*2 96
96 : 12=8
odp: Ten trapez ma wysokośc o dł. 8 cm.