👤

Un paralelogram ABCD are aria 54 cm patrari si AC=9 cm.Determinati distanta de la punctul B la dreapta AC.​

Răspuns :

Aria ABC=A ABCD/2=54/2=27 cm²

A=B*h/2=AC*h/2

A=AC*h/2

27=9*h/2

27*2=9h

h=27*2/9=3*2=6 cm deci d(B,AB)=h=6 cm