Răspuns:
Explicație pas cu pas:
a)
Δ ABC - ∡A= 90°
AM²=CM*BM
AM²= 4*16
AM²=64
AM=√64
AM= 8 cm
-
b)
Δ ABC - ∡A=90°
BC= 4+16=20
AC²= CM*BC
AC²= 4*20
AC²=80
AC= √80
AC= 4√5 cm
-
AB²= 16*20
AB²= 320
AB=√320
AB= 8√5 cm
-
P= 4√5+20+8√5
P= 12√5+20>44
P= 12√5> 44-20
P= 12√5>24 l :12
P= √5 > 2
P= √25 > √4
deci
P ABC > 44 cm