In the triangle ABC, MN is the middle line, M belongs to AB, N belongs to BC, BK is the median.

In the triangle ABC, MN is the middle line, M belongs to AB, N belongs to BC, BK is the median. If A (-1; -3), M (-4; 0), N (-3; 2). Find the length of the median BK.

The middle line of a triangle is always parallel to one of its sides and is equal to half of this side. This rule is.
MN = √ 5
Then AC = √20
The root of 20 is hypotenuse. The legs are 2 and 4, then the C coordinate (1; 1)
If you draw lines, they will intersect at the point (-7; 3). This is point B.
VK = root of (49 + 16) = √65