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Topics for the Chapter 3 Test
Here are the things you need to know for the upcoming Chapter 3 Test:
Definitions to know:
 Congruent Triangles (and CPCTC)
 Congruent Polygons
 Circle
 Center of a circle
 Radius of a circle
 Median of a triangle
 Altitude of a triangle
 Scalene Triangle
 Isosceles Triangle
 Base
 Base angles
 Legs
 Vertex angle
 Equilateral Triangle
 Equiangular Triangle
 Acute Triangle
 Right Triangle
 Obtuse Triangle
Postulates to know:
 Any segment or anlge is congruent to itselft (Reflexive Property)
 If the 3 sides of one triangle are congruent to the 3 sides of another triangle, then the triangles are congruent (SSS).
 If two sides and their included angle of one triangle are congruent to the corresponding sides and angle in another triangle, then the triangles are congruent (SAS).
 If two angles and their included side of one triangle are congruent to the corresponding angles and side in another triangle, then the triangles are congruent (ASA).
 Two points determine a line, ray or segment (Auxiliary Lines).
 If two sides of a triangle are not congruent, then the angles opposite them are not congruent and the larger angle is opposite the longer side.
 If two angles of a triangle are not congruent then the sides opposite them are not congruent and the longer side is opposite the larger angle.
Theorems to know:
 All radii of a circle are congruent
 If two sides of a triangle are congurent, then the angles opposite the sides are congruent (ITT).
 If two angles of a triangle are congruent, then the sides opposite the angles are congruent (Converse of ITT).
 If the hypotenuse and a leg of one right triangle are congruent to the corresponding parts of a second right triangle, then the triangles are congruent (HL).
Constructions to know:
 Median of a triangle
 Altitude of a triangle (both obtuse and acute)
