Ch. 3 First Quiz Flashcards

1
Q

Pt. Parallel Postulate

A

If there is a line and a pt. not on the line, then there is exactly one line through that pt., parallel to the given line.

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2
Q

Pt. Perpendicular Postulate

A

If there is a line and a pt. not on the line, then there is exactly one line through that pt., perpendicular to the given line.

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3
Q

Corresponding Angles

A

Angles that are in the same position.

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4
Q

Alternate Interior Angles

A

Alternating the inside of the line

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5
Q

Alternate Exterior Angles

A

Alternating the outside of the line

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6
Q

Consecutive or same-side interior angles

A

Two consecutive angles that add up to 180 degrees on the inside of the line

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7
Q

Corresponding Angles Postulate (CAP)

A

If two parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent.

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8
Q

Alternate Interior Angles Theorem (AIAC)

A

If two parallel lines are cut by a transversal, then alternate interior angles are congruent.

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9
Q

Alternate Exterior Angles Theorem (AEAC)

A

If two parallel lines are cut by a transversal, then alternate exterior angles are congruent.

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10
Q

Consecutive Interior Angles Theorem (SSIS)

A

If two parallel lines are cut by a transversal, then consecutive interior angles are supplementary.

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11
Q

Converse Corresponding Angle Postulate (CCAP)

A

If two parallel lines are cut by a transversal so that corresponding angles are congruent, then the lines are parallel.

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12
Q

CAIAC

A

Alternate interior angles are congruent if two parallel lines are cut by a transversal.

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13
Q

CSSIS

A

Consecutive interior angles are supplementary if two parallel lines are cut by a transversal.

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14
Q

CAEAC

A

Alternate exterior angles are congruent if two parallel lines are cut by a transversal.

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15
Q

Three parallel lines theorem.

A

If two lines are parallel to the same line, then they are parallel to each other.

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16
Q

CLIP (congruent implies perpendicular)

A

Congruent, linear pair, implies perpendicular
If two lines intersect to form a linear pair of congruent angles, then they are perpendicular.

17
Q

PITAC (perpendicular => 2 angles are complementary)

A

Perpendicular implies two angles are complementary
If two sides of adjacent angles are perpendicular, then angles are complementary.

18
Q

PIFRA (perpendicular => 4 right angles)

A

Perpendicular implies 4 right angles
If two lines are perpendicular, then they intersect to form 4 right angles

19
Q

*** PPP (perpendicular trans. theorem)

A

Parallel, perpendicular, parallel
If a transversal is perpendicular to one of the two parallel lines, then it is perpendicular to the other.

20
Q

PPPL (converse PPP)

A

All ways parallel
In a plane, if two lines are perpendicular to the same line, then they are parallel to each other.

21
Q

Use Theorems If…

A

Two parallel lines are given and the question asks stuff about them.

22
Q

Use Converse Theorems If…

A

Angles are given and have to prove they’re parallel.

23
Q

Congruent Supplement/Complement Thm. (CST)

A

If two angles are supplemental/complemental to the same angle then they are congruent.

24
Q

How to Solve a system of equations problem

A

Make sure 1 of the variables cancels out when you subtract them