4. Która z figur ma
największe pole?

1. (3*3)/2 = 9/2 = 4,5cm2
2. (2*1)/2 + (((3+2)*2)/2)*2 + ((5+2)*2)/2 = 2/2 + ((5*2)/2)*2 + (7*2)/2 = 1 + (10/2)*2 + 14/2 = 1 + 5*2 + 7 = 1 + 10 + 7 = 18cm2
3. (6*1)/2 + ((6+3)*3)/2 + (3*1)/2 = 6/2 + (9*3)/2 + 3/2 = 3 + 27/2 + 1,5 = 3 + 13,5 + 1,5 = 18cm2