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Section 1

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Theorem

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Geometry Math

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Date created

Mar 1, 2020

Cards (39)

Section 1

(39 cards)

Theorem

Front

A mathematical statement which we can prove to be true

Back

angle bisector

Front

a ray that divides an angle into two congruent angles

Back

Right Angle

Front

Angle that is 90 degrees

Back

Angle Addition Postulate

Front

If P is in the interior of <RST, then m<RSP + m<PST = m<RST

Back

adjacent

Front

Angles that have a common side and a common vertex (corner point).

Back

Segment Addition Postulate

Front

AB+BC=AC. 4+10=14

Back

Vertical

Front

2 angles that are opposite from each other and they have the same angle.

Back

Converse of Corresponding

Front

If two lines and a transversal form corresponding angles that are congruent, the lines are parallel.

Back

same side interior

Front

two interior angles on the same side of the transversal

Back

Substitution Property

Front

If a=b, then a can be substituted for b in any equation or expression

Back

Reflexive Property

Front

A quantity is congruent (equal) to itself. a = a

Back

Alternate exterior angle

Front

Angles that lie outside a pair of lines and on opposite sides of a transversal.

Back

transversal

Front

a line that intersects two or more lines

Back

Transitive Property

Front

If a=b and b=c, then a=c

Back

corresponding angles

Front

Two angles cut by a transversal, and the angles in matching corners are called corresponding angles.

Back

Segment Bisector

Front

A ray, line, or segment that divides a segment into 2 equal parts.

Back

parrallel

Front

two lines that will never intersect

Back

Congruent

Front

Having the same size, shape, or measure

Back

converse of alternate interior angles theorem

Front

If alternate interior angles are congruent, then the lines are parallel

Back

Converse of the alternate exterior

Front

If two lines and a transversal form alternate exterior angles that are congruent, the two lines are parallel.

Back

postulate

Front

a statement that is accepted as true without proof

Back

supplementary

Front

two angles that add up to 180 degrees

Back

Midpoint

Front

A point that divides a segment into two congruent segments

Back

Obtuse angle

Front

angle that is more than 90 degrees and less than 180 degrees.

Back

Plane

Front

a flat surface that has no thickness and extends forever

Back

Line

Front

A line is a line that extends forever in both directions

Back

alternate interior angles

Front

angles between 2 lines and on opposite sides of a transversal

Back

Segment

Front

A line that has two endpoints. It does not extends forever, it stops at the points.

Back

perpendicular

Front

Two lines that intersect to form right angles

Back

point

Front

A location that is represented by a dot that can be any size.

Back

Converse of the Same-Side Interior Angles Theorem

Front

if same side interior angles are supplementary, then the lines are parallel

Back

Symmetric Property

Front

if a=b, then b=a

Back

acute angle

Front

An angle that is less than 90 degrees

Back

Ray

Front

It has one endpoint and extends forever in one direction

Back

Collinear

Front

points on the same line

Back

Linear Pair

Front

Two adjacent angles that form a straight line, 180 degrees.

Back

straight angle

Front

An angle that is 180 degrees.

Back

Reflex

Front

Angle that is more than 180 degrees and less than 360 degrees

Back

complementary

Front

two angles that add up to 90 degrees

Back