Acute and Obtuse
Triangles from
Pythagorean
Theorem

Side-Angle-Side Similiarity
(SAS~)
Theorem

Similarity Ratio

Triangle
Inequality
Theorem

Side-Side-Side Similarity
(SSS~)
Theorem

Angle-Angle Similarity Postulate
(AA~)

Similar Triangles

Plane

Perpendicular Lines

Angle Bisector

Segment
Addition
Postulate

Triangle
Angle-Sum
Theorem

Complementary Angles

Altitude

Median

Congruent/Congruent

Line

Relationship of Sides and Angles
of a Triangle

Corresponding Angles

Exterior Angle

CONVERSE of the
Corresponding Angles
POSTULATE

Corresponding Angles
POSTULATE

Alternate
Interior
Angle
Theorem

Same-Side Interior Angles
Theorem

CONVERSE of the
Same-Side Interior Angles
Theorem

CONVERSE of the
Alternate Interior Angles
Theorem

Same-Side Interior Angles

Perpendicular Bisector

Point

Straight
Angle
Addition
Postulate

Transversal

Coplanar

Vertical Angles

Bisect

Triangle
Exterior
Angle Theorem

Parallel Lines

Angle

Congruent Triangles

Adjacent Angles

Alternate Interior Angles

Collinear

Remote
Interior
Angles

Supplementary Angles

Mid Point

Vertex

Segment

Hypotenuse-Leg
Theorem
(HL)

Side-Side-Side
Postulate
(SSS)

Side-Angle-Side
Postulate
(SAS)

Angle-Side-Angle
Postulate
(ASA)

Angle-Angle-Side
Postulate
(AAS)