Triunghi
AB=26
AC=26
BC=31
26+26+31
=83
-----------------------
Patrat
AB+BC=16
l=16:2=8 cm o latura
P=8x4
=32 cm
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Dreptunghi
AB=BC=399 cm
AD+406
=406+399
=805
P=805 x 2+399 x 2
P=1610+798
=2408 cm
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Dreptunghi
------------------------------
AB=3AD
AD=BC=108
AB=108 x 3
=324
P=108 x 2 + 324 x 2
P=216+648
=864 cm
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