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unit 4 math

circles lines and angles

ray a part of a 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 endpoint
line a straight path that goes on forever in opposite 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 and temperature
right angle an angle that measures 90 degrees
straight angle an of 180 degrees
supplementary angle angles having a sum of 180 degrees
complementary angles angles having a sum of 90 degrees
opposite angle when two lines intersect the angles formed are opposite angles
vertical angle pairs of opposite angles formed by intersecting lines
polygon a closed plane figure with sides made of straight line segments
congruent exactly the same size and shape
isosceles triangle a triangle with at least two congruent sides
equilateral triagle a triangle with all equal sides
scalene triangle a triangle with no equal sides
acute triagle a triangle with three acute angles
obtuse triangle
right triagle
right trapezoid
circle a plane figure that forms a closed path so that all the points on the path are the same distance from a point called the center
reflex angle an angle greater than 180 degrees
Created by: 00020016