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LESSON 1: GEOMETRY VOCABULARY • Geometry - branch of mathematics that deals with points, lines, planes and solids and examines their properties. 1. Basic terms and symbols 2. Types of Angles 3. Triangle Basic terms and symbols •Point – has no size; length, width, or height. •Line – set of points which has infinite length but no width or height. •Segment – part of a line that consists of two points called endpoints and all points between them. •Ray- is the part of a line that contains an endpoint and all points extending in the other direction •.http://quizlet.com/6352834/flashcards Collinear points – points that lie on the same line. • Similar •Congruent •Equal • Concurrent Angles(Definitions) Obtuse angle An angle whose measure is greater than 90° and less than 180° Triangle Triangle Triangle http://quizlet.com/1651867/trianglevocabulary-flash-cards/ http://quizlet.com/19561835/geometryvocabularydefinitions-flash-cards/ Homeworks What is the name of the line passing through the orthocenter, circumcenter, and centroid of the triangle? EULER ‘s LINE
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