1.

The line segment joining the mid points of two sides of a triangle is parallel to the thirdside.​

Answer»

Answer:

ANSWER

Let A be ORIGIN and B(

b

),C(

0

)

⇒ D and E as mid-points would have p.vs

2

b

and

2

c

⇒DE is parallel to

2

b

−

c

or

b

−

c

ALSO BC is parallel to

b

−

c

⇒DE∣∣BC;∣

DE

∣=

2

∣

b

−

c

∣

;

∣

BC

∣=∣

b

−

c

∣

⇒∣

DE

∣=

2

∣

BC

∣


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