a = 15 cm
h = 9 mm = 0,9 cm
[tex]P=\frac{1}{2} *a*h[/tex]
[tex]P=\frac{1}{2} *15*0,9=6,75cm^{2}[/tex] albo [tex]675mm^{2}[/tex]
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a = 15 cm
h = 9 mm = 0,9 cm
[tex]P=\frac{1}{2} *a*h[/tex]
[tex]P=\frac{1}{2} *15*0,9=6,75cm^{2}[/tex] albo [tex]675mm^{2}[/tex]