1。 . Let the equation of L be y=kx+b, intersect with the X axis by 60, and k = 3 under the root sign. Substitute x(5.0) into the equation and find the root number 3 of b=-5.

L = root number 3-5 root number 3

It's been many years, and I forgot. Let me answer one question after another.

2.。 . Look at the relationship between k, k is equal, so it is parallel.

3.。 . 180

4.。 . 12|5, use the distance formula from this point to a straight line.

5.。 .