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Geometry: Proofs and Postulates - Math Plane

geometry : Proofs and Postulates Definitions, Notes, Examples, and Practice Exercises (w/ Solutions) Topics include triangle characteristics, quadrilaterals , circles, midpoints, SAS, and more. Examples- PRACTICE EXERCISES - SOLUTIONS - Thanks for visiting. (Hope it helped!) Find more Proofs and geometry content at If you have questions, suggestions, or requests, let us know. Also, at Facebook, Google+, and TeachersPayTeachers

a) Triangles are 180 ; Quadrilaterals are 360 b) Opposite sides of congment angles are congruent (isosceles triangle) c) Perpendicular bisector Theorem (All points on perpendicular bisector are equidistant to endpoints) DM is perpendicular bisector of BC (B and C are the endpoints) BD = CD 3) Other geometry basics:

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www.mathplane.com

Introduction to proofs: Identifying geometry theorems and postulates ANSWERS C congruent ? Explain using geometry concepts and theorems: 1) Why is the triangle isosceles? PR and PQ are radii of the circle. Therefore, they have the same length. A triangle with 2 sides of the same length is isosceles. 2) Why is an altitude? AB = AB (reflexive ...

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Similar triangles: Side - Angle - Side Definition: If a pair of coresponding sides of 2 triangles have the same ratio AND the included angles are congruent, then the triangles are similar. A DEF ratio of 2 sides are equal, & non-included angles are congruent but, triangles are not similar! Comments: Example: A ABC

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