Question

aria unui triunghi este egala cu 24 cm patrati, iar inaltimile corespunzatoare laturilor au lungimile de 4,8 cm; 6 cm; si respectiv 8 cm. Atunci perimetrul este egal cu? va rog

Answer 1

A=a*h1/2=b*h2/2=c*h3/2=24
a=48/4,8=10
b=48/6=8
c=48/8=6
P=24

Answer 2

construiesti inaltimile: AM; AN; BN
A= $\frac{b*h}{2}$
24=$\frac{BC*AM}{2} = \frac{BC*4,8}{2}$
BC=24:2,4=10cm
24=$\frac{AC*BN}{2}= \frac{AC*6}{2}$
AC=24:3=8cm
24=$\frac{AB*PC}{2} = \frac{AB*8}{2}$
AB=24:4=6 cm
P= 6+8+10=24cm