Geometry Unit 1 Vocabulary and Concepts

UNIT 1 CORE VOCABULARY

Section 1.1 undefined terms, p. 4 point, p. 4 line, p. 4 plane, p. 4 collinear points, p. 4 coplanar points, p. 4 defined terms, p. 5 line segment, or segment, p. 5 endpoints, p. 5 ray, p. 5 opposite rays, p. 5 intersection, p. 6 Section 1.2 postulate, p. 12 axiom, p. 12 coordinate, p. 12 distance, p. 12 construction, p. 13 congruent segments, p. 13 between, p. 14 Section 1.3 midpoint, p. 20 segment bisector, p. 20 Section 1.4 polygon, p. 30 (previous) side, p. 30 (previous) vertex, p. 30 (previous) n-gon, p. 30 (previous) convex, p. 30 (previous) concave, p. 30 (previous) Section 1.5 angle, p. 38 vertex, p. 38 sides of an angle, p. 38 interior of an angle, p. 38 exterior of an angle, p. 38 protractor, p. 39 (previous) degrees, p. 39 (previous) measure of an angle, p. 39 acute angle, p. 39 right angle, p. 39 obtuse angle, p. 39 straight angle, p. 39 congruent angles, p. 40 angle bisector, p. 42 Section 1.6 complementary angles, p. 48 supplementary angles, p. 48 adjacent angles, p. 48 linear pair, p. 50 vertical angles, p. 50

UNIT 1 CORE CONCEPTS Section 1.1 Undefined Terms: Point, Line, and Plane, p. 4 Defined Terms: Segment and Ray, p. 5 Intersections of Lines and Planes, p. 6 Section 1.2 Postulate 1.1 Ruler Postulate, p. 12 Congruent Segments, p. 13 Postulate 1.2 Segment Addition Postulate, p. 14 Section 1.3 Midpoints and Segment Bisectors, p. 20 The Midpoint Formula, p. 22 The Distance Formula, p. 23 Section 1.4 Classifying Polygons, p. 30 Finding Perimeter and Area in the Coordinate Plane, p. 31 Section 1.5 Postulate 1.3 Protractor Postulate, p. 39 Types of Angles, p. 39 Postulate 1.4 Angle Addition Postulate, p. 41 Bisecting Angles, p. 42 Section 1.6 Complementary and Supplementary Angles, p. 48 Adjacent Angles, p. 48 Linear Pairs and Vertical Angles, p. 50 Interpreting a Diagram, p. 51

Section 1.1

Section 1.2

Section 1.3

Section 1.5

Section 1.6

Unit 1 Postulates