Parallel lines remain the same distance apart over their entire length. No matter how far you extend them, they will never meet.
A line is perpendicular to another if it meets or crosses it at right angles (90°).
A shape, formed by two lines or rays diverging from a commonpoint.
Is an angle that bisects the angle formed by two halves of a straight line.
Angles smaller thana right angle (less than 90°)
An obtuse angle is an angle with a measure greater than 90°.
An angle whosemeasure is exactly 180°.
Two angles that add up to 180°.
Two angles that add up to 90°Congruent angle
Two angles are congruent if they have the same measure.
In a polygon, adjacent angles are angles that are next to each other. Theyshare a common side. [pic]
A line that cuts through two equal parts
A triangle where all three sides aredifferent in length
A triangle which has two of its sides equal in length
A triangle which has all three of itssides equal in length
A triangle where one of its interior angles is a right angle (90 degrees)
A trianglewhere all interior angles have a measure less than 90°
An obtuse triangle is a triangle where one of the interior angles is greater than 90°