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ray a part of line that has one endpoint and extends without end in one direction.
angle a figure formed by two rays or line segments with a common end point.
line a straight path that goes on forever in both directions.
perpendicular lines,line segments,or rays are perpendicular if they form right angles.
parallel the same distance apart at every point.
oblique lines that are not parallel or perpendicular.
intersect to cut or divide by passing through or across.
protractor a tool used to measure angles.
degree a unit for measuring angles.
right angle an angle that measures 90 degrees.
straight angle an angle of 180 degrees
supplementary angles angles having a sum of 180 degrees
complimentary angles angles that have a sum of 90 degrees
opposite angle when two lines intersect
vertical angle pairs of opposite angles formed by two intersecting lines.
polygon a closed plane figure with sides made of straight line segments.
congruent exact same size exact same shape.
isosceles triangle a triangle with at least 2 congruent sides.
equalateral having all equal sides.
scalene triangle a triangle with no congruent sides.
acute triangle a triangle with three acute sides.
obtuse triangle a triangle with one obtuse angle.
right triangle a triangle with a right angle
right trapizoid a trapezoid with at least one right angle.
circle a shape that is round.
reflexangle an angle greater than 180 degrees
Created by: 100252211