are two angles that have a common vertex and a common side.
Alternate exterior angles
Alternate interior angles
They are inside the two parallel lines, and are on opposite sides of the transversal.
Two angles that sum up to be 90 degrees.
If two lines are parallel the angles are equal.
Two angels that sum up to 180 degrees.
Two straight angles.
An angle that can be equal as 90 degrees.
A line that passes through two lines in the same plane at two distinct points
each of the pairs of opposite angles made by two intersecting line.
Adding all sides together.
Multiplying one side of each length.
The sum of all areas.
The amount of Space and object can take up.
The distance around something.
A straight line passing from side to side through the center.
A straight line from the center of the circumference.
The surface of something.
The outside limit of an object.
The highest point.