Odpowiedź:a)(3+7)*4/2=20 cm2
b)(1+2)*2/2=3
c)(2+4)*5/2=15
d)(3+5)*1/2=4
z 2
a)(1+8)*4/2=36/2=18
b)(1+3)*2/2=4
c)(8+10)*4/2=36
z 3
(5+7)*4/2=48/2=24
(10+20)*12/2=180
(4+8)*3/2=36/2=18
z 4
I=(3+5)*2/2=8
II=(3+6)*4/2=36/2=18
III=(4+2)*2/2=6
IV=(5+3)*3/2=24/2=12
V=(5+3)*5/2=40/2=20
