Vocab Part I
Complement
or Supplement
Identify the
Angle Relationship
Equations +
Angles
200

Two lines that never intersect.

Parallel Lines

200

What is the supplement of 83o?

97o

200

Given lines m and n are parallel, what is the relationship between ∠3 and ∠6?

Alternate Angles

200

Given lines m and n are parallel, ∠2 = 125o, and ∠7 = 5x.  Find x.

x = 25

300

A line that intersects two or more parallel lines.

Transversal

300

What is the complement of 32o?

58o

300

Given lines m and n are parallel, what is the relationship between ∠5 and ∠8?

Vertically Opposite

300

Given lines m and n are parallel, ∠3 = 2x + 40, and ∠7 = 3x + 20.  Find m∠3.

∠3 = 80o

400

Two angles that add up to 180 degrees.

Supplementary Angles

400

What is the complement of 44.8o?

45.2o

400

Given lines m and n are parallel, what is the relationship between ∠4 and ∠6?

Cointerior Angles

400

Given lines m and n are parallel, ∠5 = 4x + 15, and ∠4 = 9x.  Find m∠5.

∠5 = 27o

500

A pair of opposite, congruent angles formed by two intersecting lines.

Vertically Opposite

500

What is the supplement of 39.2o?

140.8o

500

Given lines m and n are parallel, what is the relationship between ∠4 and ∠8?

Corresponding Angles

500

Given lines m and n are parallel, ∠4 = 5x + 44, and ∠6 = 6x + 48.  Find ∠6.

∠6 = 96o