The distance from a point O to a vertex in an equilateral triangle ABC is 3, 4 and 5 respectively

The distance from a point O to a vertex in an equilateral triangle ABC is 3, 4 and 5 respectively

150 degrees
Using auxiliary lines to make a congruent triangle with side lengths of 3 and 4
Then we can get an equilateral triangle and a right triangle by connecting the vertex of the triangle line and the intersection of the three line segments in the triangle
No picture, it's a bit confusing
What I can tell you is,
As long as the three sides connected are Pythagorean numbers
The angle between the two short sides is 150 degrees
In fact, if there is a picture, it can be explained more clearly