A trapez=70 cm²
(B+b)×h/2=70cm²
(12+8)×h/2=70cm²
20×h/2=70cm²
10cm×h=70cm²
h=7cm
Răspuns:
h = 7 cm
Explicație pas cu pas:
[tex]\displaystyle\bf\\A_{trapez}=\frac{(B+b)*h}{2}[/tex]
[tex]\displaystyle\bf\\70=\frac{(12+8)*h}{2}[/tex]
[tex]\displaystyle\bf\\70=\frac{\not2\not0*h}{\not2}[/tex]
[tex]\displaystyle\bf\\70=10*h\implies h=70:10=7\:cm[/tex]
