Celeb Glow
general | April 08, 2026

How to construct the circumcenter of a triangle using a compass ONLY.

$\begingroup$

I just figured out how to find the midpoint between two points using just a compass and no straight edge. A similar approach can be found in this question:

Constructing the midpoint of a segment by compass

Now what I am wondering is, can I find the circumcenter of a scalene triangle using just a compass and no straight edge?

I am thinking of drawing a perpendicular at C (in the diagram in the link of the answer presented by commenter and has nine likes) and choosing more points as my centres on that line to create a circle with points A and M on it. So in essence, I would be transforming a line (the perpendicular) into a circle, which I can draw using a compass. Yet, I do not really know if and how it helps.

Best of luck!

$\endgroup$ 2 Reset to default

Know someone who can answer? Share a link to this question via email, Twitter, or Facebook.

Your Answer

Sign up or log in

Sign up using Google Sign up using Facebook Sign up using Email and Password

Post as a guest

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy