math 9 grade u3 basic words

0.0(0)
Studied by 0 people
call kaiCall Kai
Locked
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/26

encourage image

There's no tags or description

Looks like no tags are added yet.

Last updated 3:54 PM on 9/5/26
Name
Mastery
Learn
Test
Matching
Spaced
Call with Kai
Chat

No analytics yet

Send a link to your students to track their progress

27 Terms

1
New cards
Addition Property
If a = b, then a + c = b + c.
2
New cards
Subtraction Property
If a = b, then a - c = b - c.
3
New cards
Multiplication Property
If a = b, then ac = bc.
4
New cards
Division Property
If a = b, then a/c = b/c.
5
New cards
Distributive Property
a(b + c) = ab + ac.
6
New cards
Substitution Property
If a = b, then a may be replaced by b in any expression or equation.
7
New cards
Reflexive Property
For any real number a, a = a. A value always equals itself.
8
New cards
Symmetric Property
If a = b, then b = a.
9
New cards
Transitive Property
If a = b and b = c, then a = c.
10
New cards
Reflexive Property of Congruence
For any segment AB, segment AB is congruent to segment AB.
11
New cards
Symmetric Property of Congruence
If segment AB is congruent to segment CD, then segment CD is congruent to segment AB.
12
New cards
Transitive Property of Congruence
If segment AB is congruent to segment CD and segment CD is congruent to segment EF, then segment AB is congruent to segment EF.
13
New cards
Definition of Congruence
Segments are congruent if and only if they have the same measure.
14
New cards
Definition of Midpoint
The midpoint of a segment divides the segment into two congruent parts (equal lengths).
15
New cards
Segment Addition Postulate
If A, B, and C are collinear points and B is between A and C, then AB + BC = AC.
16
New cards
Definition of Congruent Angles
The measures of two angles are equal if and only if the angles are congruent.
17
New cards
Definition of Right Angle
An angle measures 90° if and only if it is a right angle.
18
New cards
Definition of Complementary Angles
Two angles are complementary if and only if the sum of their measures is 90°.
19
New cards
Definition of Supplementary Angles
Two angles are supplementary if and only if the sum of their measures is 180°.
20
New cards
Definition of an Angle Bisector
An angle bisector divides an angle into two equal parts.
21
New cards
Definition of Perpendicular
Perpendicular lines form right angles.
22
New cards
Angle Addition Postulate
m∠ABD + m∠DBC = m∠ABC.
23
New cards
Vertical Angles Theorem
If two angles are vertical, then they are congruent.
24
New cards
Complement Theorem
If two angles form a right angle, then they are complementary.
25
New cards
Linear Pair Theorem (Supplement Theorem)
If two angles form a linear pair, then they are supplementary.
26
New cards
Congruent Complements Theorem
If two angles are complementary to the same angle, then they are congruent.
27
New cards
Congruent Supplements Theorem
If two angles are supplementary to the same angle, then they are congruent.