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Unit 4 Vocabulary

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 strait 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 Not parallel or perpendicular
Intersect To cut or divide by passing through one another
Portractor A protractor is a tool that is used to measure angles in degrees
Degree A unit for measuring angles also a unit for measuring temperature
Right Angle An angle that measures 90 degrees
Strait Angle An angle that measures 180 degrees
supplementary angles angles having a sum of 180 degrees
complementary angles angles having a sum of 90 degrees
opposite angles the angles formed when two lines intersect
vertical angles pairs of opposite angles formed by intersecting lines
Polygon A closed plane figure with sides made of strait line segments
Congruent Exactly the same size and shape
Isosceles Triangle A triangle with at least two congruent sides
Equilateral Triangle A triangle with all equal sides
Scalene Triangle A triangle with 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
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: 10024980