A line that intersects two or more parallel lines.
Transversal
Two lines that never intersect.
Parallel Lines
What is the supplement of 83o?
97o
Given lines m and n are parallel, what is the relationship between ∠3 and ∠6?
Alternate Interior Angles
Given lines m and n are parallel, m∠2 = 125o, and m∠7 = 5x. Find x.
x = 25
What did the snowman say to the other snowman?
Do you smell carrots?
Having the same measure (equal).
Congruent
What is the complement of 32o?
58o
Given lines m and n are parallel, what is the relationship between ∠5 and ∠8?
Vertical Angles
What's gas pump's favorite holiday?
April Fuel's day
Two angles that add up to 180 degrees.
Supplementary Angles
A pair of opposite, congruent angles formed by two intersecting lines.
Vertical Angles
What is the complement of 44.8o?
45.2o
Given lines m and n are parallel, what is the relationship between ∠1 and ∠8?
Alternate Exterior Angles
Given lines m and n are parallel, m∠5 = 4x + 15, and m∠4 = 9x. Find m∠5.
m∠5 = 27o
Two congruent angles on opposite sides of the transversal and inside the parallel lines.
Alternate Interior Angles
Two congruent angles on opposite sides of the transversal and outside the parallel lines.
Alternate Exterior Angles
What is the supplement of 39.2o?
140.8o
Given lines m and n are parallel, what is the relationship between ∠4 and ∠6?
Same Side Interior Angles
Given lines m and n are parallel, m∠3 = 2x + 40, and m∠7 = 3x + 20. Find m∠3.
m∠3 = 80o
Two angles on same side of the transversal and inside the parallel lines.
Same-Side Interior Angles
Two congruent angles located in the same position, but on a different parallel line (1 inside and 1 outside the parallel lines).
Corresponding Angles
Why couldn't the sailor finish the alphabet?
He got lost at C
Given lines m and n are parallel, what is the relationship between ∠4 and ∠8?
Corresponding Angles
Given lines m and n are parallel, m∠4 = 5x + 44, and m∠6 = 6x + 48. Find m∠6.
m∠6 = 96o