Lol ... a little quiz for a Sunday afternoon luuckyy ;-)
Try this:
1. In vertex mode, highlight the three vertices, then Vertex-->Create convex surface. (A new triangle is created as a seperate object.)
2. Hide the original object, then select the top and bottom vertices of the new triangle, then Vertex-->Insert Vertex. (A new vertex is inserted at the midpoint between the two.)
3. Highlight the inserted vertex, then in the Move/Size mode find the *Move To* utility on left panel and click the little button with the '>' on it. (The position of the vertex now shows up in the three boxes.)
4. Hide the triangle and show your orginal object. Highlight the centre vertex of the original three and click the 'Move To' button. (The center vertex moves to the new location.)
5. Delete the triangle you created.
griff
