Question

Calculați lungimile liniilor mijlocii ale triunghiului cu laturile de:
a)3 cm; 4 cm; 5 cm
b) 5/8 cm; 6/7 cm; 4/5 cm
c) v12 cm; V10 cm; v14 cm
d)2,(4) cm; 3,(6) cm; 1,(8) cm.

Va rog mult, îmi trebuie urgent!

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Answer 1

Răspuns:

a)1,5cm, 2cm, 2,5cm

b)5/16cm, 6/14=3/7cm, 4/10=2/5cm

c)(V12)/2=2(V3)/2=V3cm, "V"=radical

(V10)/2=V(5/2)cm

(V14)/2=V(7/2)cm

d)[2,(4)]/2=(24-2)/(9×2)=22/18=11/9cm

[3,(6)]/2=(36-3)/(9×2)=33/18=11/6cm

[1,(8)]/2=(18-1)/(9×2)=17/18cm