Geometry Foundations Vocab

Which lines are perpendicular? Choose all that apply.

• A & B

• A & C

• A & D

• B & C

a portion (or part) of a line consisting of two endpoints and all the points that lie between them.

• line segment

• line

• diameter

• angle

Two angles that share a common side and vertex. They are "next to" each other.

• vertical angles

• acute angles

• adjacent angles

• angle bisector

• complementary angles

An angle with a degree measure less than 90

• obtuse

• adjacent

• acute

• complementary

An angle with a degree measure less than 180 but more than 90

• obtuse

• adjacent

• acute

• supplementary

A line or ray that divides an angle into two equal parts is called

• angle bisector

• midpoint

• vertical angles

• plane

A point that divides a line into two equal parts is called

• angle bisector

• midpoint

• vertical angles

• plane

A shape that is the set of points equidistant from a given point called a center

• collinear

• circle

• midpoint

• major arc

The intersection of two rays at an endpoint called the vertex

• chord

• collinear

• angle

• supplementary angles

all sides of the triangle are congruent (same length)

• Equilateral

• Isosceles

• Scalene

• Pythagorean