# Congruent Triangles

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```					Congruent Triangles

Sections 4.1-4.3 and 4.6
Parts of a Triangle
Sides                     A
Segment    AB, AC, BC
Vertices
Points   A, B, C
Angles                B        C
Angles   A, B, C
Classification by Angles
Acute
Obtuse
Right
Equiangular
Classification by Sides

Scalene
Isosceles
Equilateral
Triangle Measurements
Angle Sum Theorem
 Three   angles of triangle = 180
Third Angle Theorem
 If two angles of triangle #1 = angles of
triangle #2, then third angles are =
Exterior Angle Theorem
 Ext.angle = sum of remote interior
angles
Isosceles Triangle
Definition:
 Triangle with two       A
congruent sides.

B       C
Isosceles Triangle
Definition:
 Triangle with two      A
congruent sides.
Theorem:
If isosceles, then B        C
base angle are
congruent.
Congruent Triangles

CPCTC
Corresponding Parts of
Congruent Triangles
are Congruent.
Congruent Triangles
A        Z
ABC  ZXY
B    C X       Y
JKL  RST           R
J  ______
K
S  ______
KL  ______
ST
Test 4.1-4.3, 4.6 Total problems:40
Classify triangles (10)
Identify parts of a triangle (2)
Find the value of x using a
diagram (10)
State congruent triangles and
their parts (6)
Multiple Choice (12)

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