Răspuns:
Explicație pas cu pas:
Teorema inaltimii in ΔBCE
AB²=AE·AC=4·9 ⇒AB=3·2=6cm
b) EC=AE+AC=4+9=13 cm
teorema catetei in ΔBCE
BE²=AE·EC=4·13 BE=2√13 cm
BC²=AC·EC=9·13 BC=3√13 cm
Pbce=BE+BC+EC=2√13+3√13+13=5√13+13≅18+13=31 cm <32 cm
am calculat 5√13≅18,02 cm
