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Part of a line that has one end point and goes in one direction without end.
Part of a line with two end points.
Two or more lines that meet at a common point.
Two rays with the same end point.
The point where two sides meet. (Shared end points of the line segments of a polygon.)
An angle that measures LESS than 90 degrees.
An angle that measures MORE than 90 degrees
An angle that is 90 degrees (It makes a square in the corner).
An angle that measures 180 degrees
Angles that are next to each other. They share a vertex and a common side.
Angles opposite one another when two lines intersect.
A plane figure with the same size and shape.
The sum of the measure of two angles is 90 degrees.
The sum of the measure of two angles is 180 degrees.
A triangle with no congruent sides
Triangle with 2 equal sides and 2 equal angles.
Triangle with a 90° angle
A triangle with one right angle.
A triangle with three acute angles.
A triangle with one obtuse angle.
Straight line across from side to side (length)
Straight up and down line (height)
the surface; Length x Width
The distance around a geometric figure.
measures the amount of space taken up by the object.
A plan formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis.
A pair of numbers that can be used to locate a point on a coordinate plane.