# data[].attributes.body
-If 2 nonvertical lines are parallel, then their slopes are equal
-If the slopes of 2 distinct nonvertical lines are equal, then the lines are parallel
-Any 2 vertical lines or horizontal lines are parallel

# data[].attributes.headline
slope-intercept form: for a nonvertical line; y = mx + b  where m is the slope and b is the y-int

# data[].attributes.subject
slope-intercept form: for a nonvertical line; y = mx + b  where m is the slope and b is the y-int

# data[].attributes.headline
slope: the slope (m) of a line is the ratio of the vertical change (rise) to the horizontal change (run) between any 2 points

# data[].attributes.subject
slope: the slope (m) of a line is the ratio of the vertical change (rise) to the horizontal change (run) between any 2 points

# data[].attributes.body
Through a point not on a line, there is one and only one line perpendicular to the given line

# data[].attributes.headline
remote interior angles: the 2 nonadjacent interior angles of a triangle

# data[].attributes.subject
remote interior angles: the 2 nonadjacent interior angles of a triangle

# data[].attributes.headline
exterior angle of a polygon: an angle formed by a side and an extension of an adjacent side

# data[].attributes.subject
exterior angle of a polygon: an angle formed by a side and an extension of an adjacent side

# data[].attributes.headline
auxiliary line: a line that you add to a diagram to help explain relationships in proofs

# data[].attributes.subject
auxiliary line: a line that you add to a diagram to help explain relationships in proofs

# data[].attributes.body
The sum of the measures of the angles of a triangle is 180

# data[].attributes.body
Through a point not on a line, there is one and only one line parallel to the given line

# data[].attributes.headline
flow proof: arrows show the logical connections between the statements and the reasons are written below the statements

# data[].attributes.subject
flow proof: arrows show the logical connections between the statements and the reasons are written below the statements

# data[].attributes.headline
Converse of the Alternate Exterior Angles Theorem

# data[].attributes.subject
Converse of the Alternate Exterior Angles Theorem

# data[].attributes.body
If 2 lines and a transversal form alternate exterior angles that are congruent, then the 2 lines are parallel

# data[].attributes.headline
Converse of the Same-Side Interior Angles Postulate (3-6)

# data[].attributes.subject
Converse of the Same-Side Interior Angles Postulate (3-6)

# data[].attributes.body
If 2 lines and a transversal form same-side interior angles that are supplementary, then the 2 lines are parallel

# data[].attributes.headline
Converse of the Alternate Interior Angles Theorem (3-5)

# data[].attributes.subject
Converse of the Alternate Interior Angles Theorem (3-5)

# data[].attributes.body
If 2 lines and a transversal form alternate interior angles that are congruent, then the two lines are parallel

# data[].attributes.headline
Converse of the Corresponding Angles Theorem (3-4)

# data[].attributes.subject
Converse of the Corresponding Angles Theorem (3-4)

# data[].attributes.body
If 2 lines and a transversal form corresponding angles that are congruent, then the lines are parallel

# data[].attributes.body
If a transversal intersects 2 parallel lines, then alternate interior angles are congruent

# data[].attributes.body
If a transversal intersects 2 parallel lines, then corresponding angles are congruent

# data[].attributes.headline
Same-Side Interior Angles Postulate (3-1)

# data[].attributes.subject
Same-Side Interior Angles Postulate (3-1)

# data[].attributes.body
If a transversal intersects 2 parallel lines, then same-side interior angles are supplementary

# data[].attributes.headline
alternate exterior angles: nonadjacent exterior angles that lie on opposite sides of the transversal

# data[].attributes.subject
alternate exterior angles: nonadjacent exterior angles that lie on opposite sides of the transversal

# data[].attributes.headline
corresponding angles: lie on the same side of the transversal (t) and in corresponding positions

# data[].attributes.subject
corresponding angles: lie on the same side of the transversal (t) and in corresponding positions

# data[].attributes.headline
alternate interior angles: nonadjacent interior angles that lie on opposite sides of the transversal

# data[].attributes.subject
alternate interior angles: nonadjacent interior angles that lie on opposite sides of the transversal

# data[].attributes.headline
transversal: a line that intersects 2 or more coplanar lines at distinct points

# data[].attributes.subject
transversal: a line that intersects 2 or more coplanar lines at distinct points

# data[].attributes.headline
parallel planes: planes that do not intersect

# data[].attributes.subject
parallel planes: planes that do not intersect

# data[].attributes.headline
skew lines: noncoplanar; they are not parallel and do not intersect

# data[].attributes.subject
skew lines: noncoplanar; they are not parallel and do not intersect

# data[].attributes.headline
parallel lines: coplanar lines that do not intersect

# data[].attributes.subject
parallel lines: coplanar lines that do not intersect