2. 25m 17 m 15 m 13 m

3. P=(25 +17)*15+17*13= 42*15+221= 630+221= 851m 2 =8,51 a

4. 19 m12 m 30 m 23 m 15 m

5. P=1/2*(30+15)*19+1/2*(30+23)*12= 1/2*45*19+1/2*53*12= 427,5+318= 745,5 m 2 =7,46 a

6. 20 m 18 m 13 m 10 m 16 m 24 m

7. P=20*10+1/2*(24+16)*18+ 1/2*24*13= 200+360+156= 716m 2 =7,16 a

8. 20 m 13 m 15 m 5 m 10 m 12 m 10 m 14 m 30 m 20 m 19 m 8 m 22 m 14 m 25 m 13 m 10 m 18 m

9. P=1/2*(22*8+30*20+30*19+10*13+25*13+25*14+10*18)= =1/2*(176+600+570+130+325+350+180)= =1/2*2331=1165,5 m 2 =11,70 a

10. 20 m 30 m 13 m 7 m 10 m 30 m

11. P=1/2*(13*7+30*10)+20*2+(30+13)*2= =1/2*(391+40+92)= =1/2*523m 2 =261,5m 2 2,6 a

12. 8,51+7,46+7,16+11,70+2,6=37,43 37,43 a = 0,37 ha 0,37*756=279,72 zł