Vocabulary: Lines and Angles

Lines that meet.

• parallel lines

• intersecting lines

• transversals

• skew lines

Lines that never meet and equidistant to each other.

• parallel lines

• intersecting lines

• transversals

• skew lines

Lines that passes through two or more lines.

• parallel lines

• intersecting lines

• transversals

• skew lines

Reversal of a conditional.

• biconditional

• inverse

• converse

• contrapositive

The common point of intersection of lines

• vertex

• midpoint

• endpoint

• any of these

The sum of all the measure of the angles in a triangle.

• 90

• 180

• 270

• 360

Two angles are supplementary. The measure of one is 80. What is the measure of the other one?

• 80

• 90

• 100

• 10

Two angles are congruent. The measure of one is 80. What is the measure of the other one?

• 80

• 90

• 100

• 110

Two angles are complementary. The measure of one is 80. What is the measure of the other one?

• 80

• 90

• 100

• 10

Lines that form a 90 degree angle.

• right

• skew

• parallel

• perpendicular