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# math games

ray a part of a line that has one end point 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 opposite directions
perpendicular lines, line segments, or rays are perpendicular because they form right angles
parallel the same distance apart at every point
oblique 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 nagles
right angle an angle that measures 90 degrres
straight angle an angle of 180 degrees
supplementary angle angles having a sum of 180
complementary angles angles having a sum of 90
opposite angle when 2 lines intersect
vertical angle pairs of angles formed by intersecting line .
polygon a closed plane figure made of straight lines
congruent exactly same size and same shape
isosceles triangle a triangle with at least 2 congruent sides
equilateral triangle having all equal sides
scalene triangle a triangle with at no equal sides
acute triangle a triangle with three acute angles
obtuse triangle a triangle with one obtuse angle
right triangle a triangle with one right angle
right trapezoid a trapezoid with at least one right angle.
reflex angle an angle greater than 180 degrees, but 360 degrees
circle a plane figure that forms a closed path so that all the points on a path are the same distance from a point called a center.
Created by: 00017268

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