Basic Geometry Concepts
Connects to endpoints.
line segment
An angle that is less than 90 degrees.
Acute angle
The triangle has three equal sides
equilateral
Lines that never intersect.
parallel lines
Two angles measurements equal 90 degrees.
complementary angles
An exact location in space.
Point
An angle that is exactly 90 degrees.
right angle
This triangle has two equal sides.
isosceles
lines that intersect at one point and form a 90 degree angle.
perpendicular lines
two angles measurements that equal 180 degrees
supplementary angles
A set of points that lie on the same.
collinear
An angle that is exactly 180 degrees.
Straight angle
This triangle has no equal sides
scalene
Lines that meet at a point.
Intersecting lines
Two pairs of angles that are formed by intersecting lines. The angles are equal to each other. They are also opposite angles.
Vertical angles
All points and lines that lie on the plane.
coplanar
An angle that is greater than 90 degrees, but less than 180 degrees.
obtuse angle
This triangle has three angles less than 90 degrees.
acute triangle
These lines never intersect, because they are not on the same plane.
skew lines
Two angle that share a common side and vertex. The angles are next to each other.
adjacent angles
An _________ is formed when two rays share an endpoint.
angle
An angle that is greater than 180 degrees, but less than 360 degrees.
Reflex angle
This triangle has one angle greater than 90 degrees.
Obtuse triangle
Compare/contrast parallel lines and skew lines.
parallel lines are two coplanar lines that never intersect
skew lines are lines that are not coplanar and can never intersect
The line that intersects two parallel lines.
transversal line