ch4.2 congruent triangles
TRANSCRIPT
Ch4.2_CongruentTriangles.notebook
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Chapter 4.2Congruent Triangles
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Congruent means same measure (or size and shape)
Congruent triangles havecongruent angles andcongruent sides
≅
X
ZY A C
B
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Types of Triangle CongruencesThe SSS Postulate
2 triangles are congruent if:3 sides of one triangle are equal to the 3 sides of the other triangle
(sidesideside)
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Types of Triangle CongruencesThe SAS Postulate
2 triangles are congruent if:2 sides and their included angle of one triangle are equal to 2 sides and their included angle of the other triangle
(sideangleside)
Included angle
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Types of Triangle CongruencesThe ASA Postulate
2 triangles are congruent if:2 angles and their included side of one triangle are equal to 2 angles and their included side of the other triangle
(anglesideangle)
Included side
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Are the following triangles congruent?If so, by what congruence postulate?
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Which Postulate?
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Statement Reason
Definition ofperpendicularlines
Prove: ΔVWX ≅ ΔZXY
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Given: RQ = RSRT bisects <QRS
Prove: ΔQRT = ΔSRT
Q
R
ST
Statement Reason
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