Pomocy proszę was Daje NAJ TO NA TERAZ PLIS

Zadanie 1 a) a= 7cm h= 4cm P = a* h /2 P= 7* 4/2 = 7*2 P= 24 b) b= 3 1/2 = 7/2 h = 4 3/7 = 31/7 P= b*h/ P= 7/2 * 31/7 /2 P= 217/14 /2 = 217/14 * 1/2 = 217/28 P= 7,75 Zadanie 2 a) a=8cm h=3cm P= a*h/2 P= 8*3 /2 = 4*3 P= 12 b) b= 4 1/5 = 21/5 h= 1 1/7= 8/7 P= b*h/2 P= 21/5 * 8/7 /2 = 168/35 * 1/2 = 168/ 70 P= 2,4 Zadnie 3 a) a= 1,5dm = 0,15 cm h= 8cm P= a*h /2 P= 0,15 * 8 /2 = 0,15 * 4 = 0,6 P= 0,6 b) b= 4,5cm h= 2 1/3 dm = 7/3 dm= 2,3dm = 0,23cm P= b*h /2 P= 4,5 * 0,23 /2 = 1,035 /2 P= 0,5175 licze na naj