Let AABC have incircle C(O,r), and let the points of tangency of C(O,r) with BC , AC, AB be D, E and F respectively. Prove that DEF cannot be a right angled triangle. F. D
Let AABC have incircle C(O,r), and let the points of tangency of C(O,r) with BC , AC, AB be D, E and F respectively. Prove that DEF cannot be a right angled triangle. F. D
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter1: Vectors
Section1.2: Length And Angle: The Dot Product
Problem 30EQ
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