Apatrat=L la puterea a doua=0,02•0,02
A=0,004
Adreptunghi=L•l=3000•3000
transformi pe 3000mm in cm 300cm
A=300•3000=900000cm patrati
Atrapez=(B+b)•h
-----------
2
A=(0,001dam+20cm)•500mm
------------------------------------
2
transformi pe 0.001dam in cm 1cm si pe 500mm in cm 50cm
A=(1+20)•50
------------
2
A=21•50=1050=525cm patrati
-------- --------
2. 2
Aromb=D•d=1001•0,9 900,9
------ -----------=----------
2. 2. 2
Acerc=πR patrat=3,14•0,07 pătrat
