Lines
Lines that pass through the same point
Intersecting Lines
Formed by two rays that have the same endpoint
Angle
Three-sided polygon
Triangle
A triangle in which all the sides are the same
Equilateral Triangle
When a shape can be divided and both halves are exactly alike
Symmetry
A straight path of points that goes on forever in two directions
Line
An angle that measures 90 degrees
Right Angle
Two- dimensional shapes that are made of straight lines and are closed
Polygon
A triangle with two sides that are the same length
Isosceles Triangle
Two figures that have the same shape and the same size
Congruent
Lines that pass through the same point
Intersecting Lines
An angle that measures less than 90 degrees
Acute Angle
An endless flat surface
Plane
A triangle with one right angle
Right Triangle
A triangle that has one angle that is obtuse
obtuse triangle
A part of a line with two endpoints
Line Segment
An angle that measures 180 degrees
Straight Angle
A four-sided polygon
Quadrilateral
A Triangle in which no sides are the same length
Scalene Triangle
an exact location in space
point
Lines that never intersect
Parallel Lines
An angle that measures between 180 and 360 degrees
Reflex Angle
A 1-degree angle.
Unit angle
A triangle that has all acute angles
Acute Triangle
Lines that form a 90 angle
Perpendicular Lines