They do appear at a common point.
Work Step by Step
To draw the three altitudes of an obtuse triangle, start in each corner, and then draw a line from the corner to the middle of the opposite side.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.