Geometry Basics Vocab

What are perpendicular lines?

• Lines that intersect

• Lines that intersect and make V's

• Lines that intersect and make acute and obtuse angles

• Lines that intersect and form right angles

What are parallel lines?

• Lines that intersect

• Lines that form right angles

• Lines that never intersect

• Lines that lol

How many noncollinear points determine a plane?

• 1

• 2

• 3

• infinitely many

Which of the following words describes the picture?

• ray

• segment

• line

• plane

A line with a single endpoint (or point of origin) that extends infinitely in one direction.

• line

• point

• ray

• straight angle

A straight, one-dimensional figure having no thickness and extending infinitely in both directions.

• line

• point

• ray

• straight angle

Points on the same line are _____________ points.

• coplanar

• coordinate

• conjecture

• collinear

The exact middle point.

• midpoint

• segment

• congruent

• angle

____________ are lines that lie in the same plane

• coplanar lines

• collinear points

• line segments

• intersection

What is a straight angle?

• An angle that measures more than 90 degrees

• An angle that measures less than 90 degrees

• An angle that measures exactly 90 degrees

• An angle that measures exactly 180 degrees