]]>https://www.mathisfunforum.com/profile.php?id=676942021-11-16T10:17:09Zhttps://www.mathisfunforum.com/viewtopic.php?pid=421858#p421858In an acute-angled triangle ABC, a tangent is drawn to the inscribed circle, parallel to side BC. The tangent intersects side AC at point D. F is the orthogonal projection of point D onto the side BC. Show that AB=AD+BF]]>https://www.mathisfunforum.com/profile.php?id=87752021-11-16T04:32:15Zhttps://www.mathisfunforum.com/viewtopic.php?pid=421843#p421843