Hej!
a]
[tex]a=10 \ cm, \ h=5 \ cm\\\\P=\frac{1}{2}\cdot10\cdot5=\frac{1}{2}\cdot50=\boxed{25 \ cm^2}[/tex]
b]
[tex]a=5 \ cm, \ b=12 \ cm\\\\P=\frac{1}{2}\cdot5\cdot12=\frac{1}{2}\cdot60=\boxed{30 \ cm^2}[/tex]
c]
[tex]a=5 \ cm, \ h=6 \ cm\\\\P=\frac{1}{2}\cdot5\cdot6=\frac{1}{2}\cdot30=\boxed{15 \ cm^2}[/tex]
Pozdrawiam! - Jula
