Properties, Postulates, Definitions, and Theorems

If two angles form a linear pair, then they are supplementary angles.

• Theorem

• Postulate

• Definition

• Property

Tags

CCSS.7.G.B.5

If two lines intersect in one point, then exactly one plane contains both lines.

• Theorem

• Postulate

• Definition

• Property

Perpendicular lines are two lines that intersect at 90° angles.

• Theorem

• Postulate

• Definition

• Property

Tags

CCSS.HSG.CO.A.1

All right angles are congruent.

• Theorem

• Postulate

• Definition

• Property

Tags

CCSS.4.G.A.1

Postulates are ​ (a)   and theorems are​ (b)   .

• something accepted as true without being proven

• statements that can be proven

If parallel lines have a transversal, then corresponding angles are congruent.

• Theorem

• Postulate

• Definition

• Property

Tags

CCSS.8.G.A.5

A line has an infinite number of points extending in opposite directions.

• Theorem

• Postulate

• Definition

• Property

Tags

CCSS.4.G.A.1

If a point lies outside a line, then exactly one plane contains both the line and the point.

• Theorem

• Postulate

• Definition

• Property

Tags

CCSS.HSG.CO.A.1

If two points lie in a plane, then the line joining them lies in that plane.

• Theorem

• Postulate

• Definition

• Property

A line contains at least two points.

• Theorem

• Postulate

• Definition

• Property

Tags

CCSS.4.G.A.1