Question

Vă rog urgent ex. 14, dau coroană.

Answer 1

d _____|___|___|____|____|_______________________

             A    M     B       N     C

MN= ?

a) AB=8 / BC=10

AB = AM+MB=AB:2=8:2=4

BC=AN + NC= BC:2=210:2 = 5

MN= MB + BN= 4+5=9

b) AB = 20, BC = 40

AB:2= MB=20:2 = 10

BC=BNX2=BC:2=40:2 = 20

MN =10+20=30

C) AB=6, BC=4

MN=MB+BN=3+2=5

D) AB=12, BC=9

MN=MB+BN=6+3=9

E) AB=6, AC=80

AC=AB+BC

80 = 6+BC

BC=80-6=74

MN=MB+BN=3+34=37

F) AC=14, BC=6

AC=AB+BC

14=AB+6

AB=14-6=8

MN=MB+BN=4+3=4