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What to know for the Chapter 1 Test
Definitions
 Undefined Terms (points, lines, planes)
 Line segment (endpoints)
 Ray (endpoint)
 Angle (vertex, sides)
 The length of a line segment
 Acute angle
 Right angle
 Obtuse angle
 Straight angle
 Congruent segments (and associated symbology)
 Congruent angles (and associated symbology)
 Collinear points
 Noncollinear points
 Theorem
 Segment bisector
 Midpoint of a segment
 Segment trisectors
 Angle bisector
 Angle trisectors
 Postulate
 Deductive structure
 Conditional statements
 Probability
Theorems
 If two angles are right angles, then they are congruent (the right angle theorem or RAT)
 If two angles are straight angles, then they are congruent
 If a conditional statement is true, then its contrapositive is also true
Types of Problems
 Determining unions and intersections in diagrams
 Angle and triangle restrictions
 Converting angle measures in degrees, minutes, seconds form to fractional form
 Converting angle measures in fractional form to degrees, minutes, seconds form
 Adding and subtracting angle measures in degrees, minutes, seconds form
 Clock problems
 Assumptions from diagrams (what can be assumed, what cannot be assumed)
 Constructions
 Segment bisector
 Angle Bisector
 Equilateral triangle (60° angle)
 Transformations on the coordinate plane (90°, 180°, 270°, and reflection over y = x)
 Symmetry (Rotational and Reflectional)
 Determining the converse, inverse, contrapositive of conditional statements
 Chain of reasoning
 Simultaneous equations
 Probability
