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a=6cm
h=3cm
pole=½ah=½×6×3=9cm²
b=4,5cm
p=½bh₂
9=½×4,5h₂
h₂=9:2,25
h₂=4cm = szukana wysokosć
2]
h=24cm
pole=½(a+b)h
792=½(a+b)×24
a+b=792:12
a+b=66
5x+6x=66
11x=66
x=66:11
x=6
podstawy mają:5×6=30cm i 6×6=36cm
3]
a²=128
a=√128
a=8√2cm
d=a√2=8√2√2=16cm=przekątna