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Geometry Vocabulary Geometry - branch of mathematics that deals with points, lines, planes and solids and examines their properties. • Types of the line of the triangle • Polygon POLYGON REGULAR POLYGON POLYGON . • • • • Parallelogram – quadrilateral with both pairs of opposite sides parallel. Rectangle – parallelogram with a right angle. Rhombus – parallelogram with consecutive sides congruent. Square – all sides congruent and all four right angles. Trapezoid – quadrilateral with exactly one pair of opposite sides parallel. Types of the line of the triangle Types of the line of the triangle • Midpoint of a segment – a point that divides the segment into two congruent segments. • Median – segment from the vertex of a triangle to the midpoint of the opposite side. • Altitude – segment from the vertex of a triangle perpendicular to the line containing the opposite side. • Midsegment - line segment joining the midpoints of two sides of a triangle. • Perpendicular bisector: A line which cuts a line segment into two equal parts at 90°. • Angle bisector :A line which cuts an angle into two equal halves. Warm-up • http://quizlet.com/9553277/chapter-6polygons-and-quadrilaterals-vocab-flashcards/ • http://www.artofproblemsolving.com/Forum/ resources.php?c=150&cid=237&year=2010&si d=40de6d924d0ce22199df0e1799451c0c What is the name of the line passing through the ……,…….and ……. of the triangle? (1): center (2): centroid (3): orthocenter