Circle tan line through point rad 40.8 how?


#1

Hi,
V5
see attached. What is the correct way of placing a circle tangent to the sloping line and going through the point and of rad 40.8 ?

I see no circle tan point rad option.

There has to be only one possibility for a circle to be tan to a line and through a point, correct me if I am wrong.

If there is only one possibility for fit then that is the correct condition for a command to exist I think ?

How is this circle tan point rad done ?

SECONDLY…how does one place a circle point point rad ?

Its possible and again only one solution but I see no point point rad option.

Circle tan line through point rad 40.8 how.3dm (23.7 KB)

Cheers

Steve


(David Cockey) #2

Use some geometry.

Desired circle has radius of 40.8 and is tangent to the sloping line. That means the center of the desired circle will lie on a line offset from the sloping line by the radius, 40.8.

Desired circle has radius of 40.8 and passes through a point. That means the center of the desired circle will lie on a construction circle with center on the point and radius of 40.8.

Center of the desired circle will be at the intersection of the offset line and construction circle.

See attached file.Circle tan line through point rad 40.8 how DC.3dm (110.9 KB)


(Pascal Golay) #3

I’d do this:

Offset the line by the circle diameter.
Circle Tangent-Tangent-Point

Circle tan line through point _tan_tan_point.3dm (34.7 KB)

Easier: Circle > Tangent option (click on line), Type radius and Enter, Point option > snap to the point.

-Pascal


#4

Another method:
Line Perpendicular optionn FromFirstPoint 40.8 and get the circle center
Ciao Vittorio