Lines, Line Segments, and Rays
This is straight and goes on and on in both directions.
Line
These lines are the same distance apart ALWAYS.
Parallel Lines
It has three sides and three angles.
Triangle
A 2 dimensional figure with three or more sides that is closed.
Polygon
A 90 degree angle.
Right Triangle
This looks like a line, but has a beginning and end.
Lines that cross at a point
Intersecting lines
It has four equal sides and four right angles.
Square
A four sided polygon.
Quadrilateral
An angle that is smaller than 90 degrees.
Acute Angle
This divides a shape into halves that are the same size and shape
Line of Symmetry
Lines that form four right angles?
Perpendicular Lines
It has five sides and five angles.
Pentagon
A quadrilateral with exactly 1 pair of parallel sides.
Trapezoid
An angle that is bigger than 90 degrees.
Obtuse Angle
This is named for the starting point and another point somewhere along the way and in that order.
Ray
An example is railroad tracks.
Parallel lines
It has six sides and six angles.
Hexagon
The corner, or point at which line segments meet in a polygon.
Vertex
A triangle with all sides equal.
Equilateral Triangle
These are stops along the way of a line, line segment, and ray, and are usually named with a letter.
Points
An example is an intersection with traffic lights.
Intersecting lines
It has eight sides and eight angles.
Octagon
A quadrilateral with two pairs of opposite and parallel sides.
Parallelogram
A triangle with two sides the same length.
Isosceles triangle