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Dane: szukane;
a=3 Pp=?
h=5 Pb=?
Pc=?
Pp= (w ułamku) a²√3/4
Pp= 3²√3/4
Pp=9√3/4
Pb= 3×5
Pb=15
Pc=2×9√3/4+15
Pc=12√3
b)Pp=½×4×2
pp=8
pb₁=4×5=20
pb₂=2×5=10
pb₃=2×5=10
Pb= 20+10+10
pb=40
Pc=2×pp+pb= 56