Geometry Chapter Vocabulary

Pair of angles with a common vertex, a common side, and no common interior points

• adjacent angles
• vertical angles
• complementary angles
• same side interior angles

To divide into two congruent parts

• bisect
• point
• collinear
• inverse

A point, ray, line, segment or plane that intersects a segment at its midpoint

• bisector
• converse
• ray
• congruent

Two angles whose sum is 90 degrees

• complementary
• supplementary
• linear pair
• adjacent angles

An if-then statement composted of two parts, they hypothesis and the conclusion

• conditional statement
• coplanar
• collinear
• angle

Swapping the the hypothesis and conclusion AND reversing the order

• contrapositive
• converse
• inverse
• conditional

Swapping the hypothesis and conclusion of a conditional statement

• converse
• inverse
• contrapositive
• conditional

Geometry based upon postulates of Euclid

• Euclidean Geometry
• theorem
• postulate
• skew lines

Negating the hypothesis and conclusion of a conditional statement without reversing order

• inverse
• converse
• contrapositive
• conditional

A straight path that extends forever in both directions

• line
• ray
• line segment
• point