Zadanie 3 daję naj i 30 pkt Na teraz potrzebuję

1) 2*1/2 + (2+4)*2/2 = 1+6 = 7 cm 2) (6+10)*8/2 + (6+15)*8/2 = 16*4+21*4 = 148 m 3) 6*3 + 2*(2,5+1)*2/2 = 18+2*3,5 = 25 cm 4) (3+2)*1/2 + 3*1 = 3+3 = 6 dm

1. 1/2 x 1 x 2 = 1cm^2 1/2 x (4+2) x 2 = 8cm^2 P= 8 - 1 = 7cm^2 2. 1/2 x (6+10) x 8 = 64m^2 1/2 x (6+15) x 8 = 84m^2 P= 64+84= 148m^2 3. 1/2 x (1+4) x 2 = 5cm^2 6 x 5 = 30cm^2 P= 30-5= 25cm^2 4. 1/2 x (3+2) x 1 = 3dm^2 1 x 3 = 3dm^2 P= 3 + 3 = 6dm^2