Triangle Proofs and Angle Relationships

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11 Terms

1
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Vertical Angles

Angles opposite each other when two lines intersect.

2
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Supplementary Angles

Two angles that add up to 180°.

3
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Reflexive Property

A segment or angle is equal to itself.

4
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Corresponding Angles

Angles in the same position on parallel lines.

5
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Alternate Interior Angles

Angles on opposite sides of a transversal, inside parallel lines.

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Perpendicular Lines

Lines that intersect at a 90° angle.

7
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SSS (Side-Side-Side)

All three corresponding sides are equal.

8
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SAS (Side-Angle-Side)

Two sides and the included angle are equal.

9
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ASA (Angle-Side-Angle)

Two angles and the included side are equal.

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Whats the theorem for tri cong we cant use?

AAS

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CPCTC

Corresponding parts of congruent triangles are congruent.