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# Unit 4 (math)

a part of line that has one endpoint and extends without end in one direction ray
a figure formed by two rays or line segments with a common endpoint angle
a straight path that goes on forever in opposite directions line
lines, line segments, or rays are perpendicular if they form right angles perpendicular
the same distance apart at every point parallel
lines that are not parallel or perpendicular oblique
to cut or divide by passing through or across intersect
a tool used to measure angles protractor
a unit for measuring angles. also a unit for measuring temperature degree
an angle that measures 90 degrees right angle
an angle of 180 degrees straight angle
angles having a sum of 180 degrees supplementary angles
angles having a sum of 90 degrees complementary angles
when two lines intersect, the angles formed are these opposite angles
pairs of opposite angles formed by intersecting lines vertical angles
a closed plane figure with sides made of straight line segments polygon
exactly the same size and shape congruent
a triangle with at least two congruent sides isosceles triangle
having all equal sides equalateral
a triangle with no equal sides scalene triangle
a triangle with three acute angles acute triangle
a triangle with one obtuse angle obtuse triangle
a triangle with one right angle right triangle
a trapezoid with at leas one right angle right trapezoid
a plane figure that forms a closed path so that all the points on the path are the same difference from a point called the center circle
an angle greater than 180 degrees reflex angle
Created by: 000194151