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Sagot :

Réponse :

c) (MN)//(BC)

thales

AM/AB=AN/AC=MN/BC

3/5=AN/5=MN/2

3/5=AN/5

AN=5*3/5 = 3cm

AN/AC=MN/BC

3/5=MN/2

2*3=5MN

MN=6/5=1,2cm

3) PAMN =

AM+MN+NA=3+1,2+3= 7,2cm

PBMNC =

BC+CN+NM+MB=2+2+1,2+2 =7,2cm

Explications étape par étape

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