Intro to Geometry Proofs Vocab

Two angles whose sides form two pairs of opposite rays, share the same vertex, and are equal are called a _____________________.

• congruent angles

• right angles

• vertical angles

• acute angles

Points that lie in the same plane are called ____________________.

• coplanar points

• collinear points

• line segment

• defined terms

_______________________ are angles that have the same measure.

• congruent angles

• right angles

• acute angles

• straight angles

A _______________ is a flat, 2-dimensional surface usually represented by a shape that looks like a floor or a wall.

• plane

• segment bisector

• line

• ray

A point that divides, or bisects, a segment into two congruent segments is called a ___________________.

• midpoint

• congruent segment

• angle bisector

• endpoint

A _____________________________ is a part of a line that consists of 2 points, called endpoints, and all of the points between those endpoints.

• line segment

• line

• ray

• congruent segments

A ray that divides an angle into 2 angles that are congruent is called an __________________________________.

• angle bisector

• segment bisector

• opposite ray

• midpoint

A point, ray, line, segment, or plane that intersects a segment at its midpoint is called a _______________________________.

• segment bisector

• angle bisector

• line

• congruent segment

A _____ is described as a straight, continuous arrangement of an infinite number of points.

• point

• line

• plane

• collinear points

Given: B is the midpoint of Segment AC. What should you conclude?

• AB + BC = AC

• Segment AB ≅ Segment BC

• AB = AC

• ABC is a straight angle