Question

how to draw 45degree with compass

Answer 1

draw a random line
by the end of line put the tip of compass and make an arc of small radius
frm the inner side without disturbing the radius cut an arc again as centre on arc cut another arc .
taking new arc as a centre make an intersection point
from that point and on the line make the intersection point and that is 45 degree

Answer 2

first you draw 90° which is the very simple you will see one line cut on a mid point take arc on that point you will get 45°angle..........