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# Unit 4 Math

### Circles,Lines,And Angles

Ray A part of a line the has one endpoint and extends without end in the other direction
Angle A figure formed by two rays or two endpoints 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 a right angle
Parallel The same distance apart at every point
Obligue Lines that are not parallel or perpendicular
Intresect To cut or divide by passing through or across
Protractor A tool used to measure angles
Degree A unit for measuring angles and temperatures
Right Angle A angle that measures 90 degrees
Straight Angle A angle of 180 degrees
Opposite angle when two lines intersect
Verticle angle Pairs of opposite angles formed by intersecting lines
supplementary angles angles having a sum of 180 degrees
complementary angles Angles having a sum of 90 degrees
Polygon 2d shape with straight sidess
Congruent same size and same shape
Isosceles trisngle 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 acute angle
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 A angle greater then 180 degrees
Created by: 00021723