How to draw an Arc wall

[delwer]

I'm trying to draw an Arc-shaped Wall (via Wall>A) that is exactly half a circle. It requires the length of the wall and the angle, but I don't know the wall's final length, only the start point and end point. What should I do?

[Keith.Brown · Accepted solution]

If it is half a circle then your start point and your end point is equal to the diameter and the midpoint of the line equals the centerpoint of the circle.  Just draw your half circle as a line and then start the wall add command, choose arc, select the start point, then select the midpoint of the half circle circumference and then select the endpoint.

Alternatively you can just draw the half circle and then start the WALL command (not the WALLADD command) and choose convert and then select your half circle.