AB and AC are two tangents to a circle and AD cuts it. Let CE be the chord through C parallel to AD, and let BE meet AD in F. Then, if FG be drawn perpendicular to CE, it will bisect it in G.
See also
iPad Productivity Apps; Adobe Spark Post
Books of Lemmas Index
Proposition 1
Proposition 2
Proposition 3
Proposition 4
Proposition 5
Proposition 6
Proposition 7
Proposition 8
Proposition 9
Proposition 10
Proposition 11
Proposition 12
Proposition 13
Proposition 14
Proposition 15
