Suppose we decide to work in Euclidean Geometry in the plane. What do we know about angle ACD relative to the angles at A and B, e.g., what can be said about an exterior angle relative to its opposite interior angles? How do you know so? (In other words, informally justify your claim.) Let AABC be given, and suppose D is a point on BC such that B - C - D. Then ZACD is called an exterior angle of the given triangle. The angles at A and B of AABC are called opposite interior angles of LACD. EXTERIOR ANGLE OF A TRIANGLE Figure 3.27

Suppose we decide to work in Euclidean Geometry in the plane. What do we know about angle ACD relative to the angles at A and B, e.g., what can be said about an exterior angle relative to its opposite interior angles? How do you know so? (In other words, informally justify your claim.) Let AABC be given, and suppose D is a point on BC such that B - C - D. Then ZACD is called an exterior angle of the given triangle. The angles at A and B of AABC are called opposite interior angles of LACD. EXTERIOR ANGLE OF A TRIANGLE Figure 3.27

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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