Question

Buna seara ! Clasa a7 a

Answer 1

AN=2,5 cm
MN=3 cm
P=9,5 cm

Answer 2

a) AN=?
AM=MC=4
->tr AMN este asemanator cu tr ABC

deci-> AN/AC = AM/AB = MN/BC
-> AN/8 = 4/12 = MN/9

AN/8 = 4/12 => AN= 8•4/12 = 8/3 = 2,6
AN=2,6 cm

b) MN=?

MN/9 = 4/12 => MN= 9•4/12 = 3
MN=3 cm

c) Perimetrul tr AMN=?

P= AN + MN + AM= 4+3+8/3
= 12+9+8 /3 = 29/3 = 9,6
P=9,6 cm