1. From the coordinates of B and C, we can get the slope k of the straight line bc = 2/3.

Then the high slope K65438 on bc+0 =

-3/2, higher than point A, according to the equation of the straight line where the oblique point and the height of bc side are located, we can get the following:

y=

-

3/2x+6

2. From the coordinates of B and C, we can get the midpoint coordinates of bc line as follows: (3,5) The midline passes through point A, and according to the two-point formula, we can get the equation of the midline of bc side as follows:

y=

-

x+20

3. The slope of the vertical line at 3.bc side is k 1=

-3/2, passing through the midpoint (3, 5), and according to the point inclination, the equation of the median line of bc side is obtained:

y=

-

3/2x+ 19/2