Geometry Postulates and Theorems for Proofs Flashcards

1
Q

Segment Addition Postulate

A

If point B is between points A and C on a line, then AB + BC = AC

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2
Q

If point B is between points A and C on a line, then AB + BC = AC

A

Segment Addition Postulate

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3
Q

Angle Addition Postulate

A

If Point S is in the interior of <PQR, then m<PQS + m<SQR = m<PQR

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4
Q

If Point S is in the interior of <PQR, then m<PQS + m<SQR = m<PQR`

A

Angle Addition Postulate

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5
Q

Pythagorean Theorem

A

a^2 + b^2 = c^2

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6
Q

a^2 + b^2 = c^2

A

Pythagorean Theorem

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7
Q

a=a (P.O.E)

A

Reflexive P.O.E

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8
Q

Reflexive P.O.E

A

a=a (P.O.E)

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9
Q

Symmetric P.O.E

A

if a=b, then b=a (P.O.E)

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10
Q

if a=b, then b=a (P.O.E)

A

Symmetric P.O.E

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11
Q

if a=b, and b=c, then a=c (P.O.E)

A

Transitive P.O.E

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12
Q

Transitive P.O.E

A

if a=b, and b=c, then a=c (P.O.E)

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13
Q

if a=b, then b can be used in place of a

A

Substitution P.O.E

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14
Q

Substitution P.O.E

A

if a=b, then b can be used in place of a

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15
Q

y+2 = 7
y = 5
what P.O.E was used?

A

Subtraction P.O.E

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16
Q

Subtraction P.O.E

A

y+2 = 7
y = 5
what P.O.E was used?

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17
Q

y-2 = 7
y = 9
what P.O.E was used?

A

Addition P.O.E

18
Q

Addition P.O.E

A

y-2 = 7
y = 9
what P.O.E was used?

19
Q

y/2 = 4
y = 8
what P.O.E was used?

A

Multiplication P.O.E

20
Q

Multiplication P.O.E

A

y/2 = 4
y = 8
what P.O.E was used?

21
Q

Division P.O.E

A

2y = 8
y = 4
What P.O.E was used?

22
Q

2y = 8
y = 4
What P.O.E was used?

A

Division P.O.E

23
Q

Theorem 1-5

A

If two angles are congruent AND supplementary angles, then each angle is a right angle

24
Q

If two angles are congruent AND supplementary angles, then each angle is a right angle

A

Theorem 1-5

25
Q

Vertical Angles Theorem

A

All vertical angles are congruent

26
Q

All vertical angles are congruent

A

Vertical Angles Theorem

27
Q

Congruent Supplements / Compliments Theorem

A

If two angles are supplementary / complementary to the same angle (ex. A ≅ B, B≅C, where B is the ‘Same Angle’ as described) then they [A and C] are congruent

28
Q

If two angles are supplementary / complementary to the same angle (ex. A ≅ B, B≅C, where B is the ‘Same Angle’ as described) then they [A and C] are congruent

A

Congruent Supplements / Compliments Theorem

29
Q

Right Angle Theorem

A

All right angles are congruent

30
Q

All right angles are congruent

A

Right Angle Theorem

31
Q

Linear Pair Theorem

A

Linear Pairs are supplementary

32
Q

Linear pairs are supplementary

A

Linear Pair Theorem

33
Q

Same Side Interior Angles Postulate

A

If two parallel lines are cut by a transversal, then the Same-Side Interior Angles are Supplementary

34
Q

If two parallel lines are cut by a transversal, then the Same-Side Interior Angles are Supplementary

A

Same Side Interior Angles Postulate

35
Q

Corresponding Angles Theorem

A

If two parallel lines are cut by a transversal, then the Corresponding Angles are Congruent

36
Q

If two parallel lines are cut by a transversal, then the Corresponding Angles are Congruent

A

Corresponding Angles Theorem

37
Q

Alternate Interior Angles Theorem

A

If two parallel lines are cut by a transversal, then the Alternate Interior Angles are Congruent

38
Q

If two parallel lines are cut by a transversal, then the Alternate Interior Angles are Congruent

A

Alternate Interior Angles Theorem

39
Q

Alternate Exterior Angles Theorem

A

If two parallel lines are cut by a transversal, the Alternate Exterior Angles are congruent

40
Q

If two parallel lines are cut by a transversal, the Alternate Exterior Angles are congruent

A

Alternate Exterior Angles Theorem