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Geometry Vocabulary

Math- Chapter 10

angle formed by 2 lines with a common endpoint
vertex the point were two sides or line meet
exterior on the outside of an angle
interior on the inside of an angle
protractor a tool used to measure angles
degrees the symbol used to write the measurement of an angle
acute angle an angle measuring less than 90 degrees
right angle an angle measuring exactly 90 degrees
obtuse angle an angle measuring more than 90 degrees, but less than 180 degrees
polygon closed plane figures made up of line segments called sides
congruent polygons exactly the same size and shape
corresponding parts matching sides or angles
similar polygons have the same shape
scalene triangle triangle with no sides congruent
isosceles triangle triangle with 2 sides congruent
equilateral triangle all sides of the triangle are congruent
acute triangle triangle with 3 acute angles
right triangle triangle with 1 right angle and 2 acute angles
obtuse triangle a triangle with 1 obtuse angle and 2 acute angles
quadrilateral a 4 sided polygon
straight angle an angle measuring exactly 180 degrees
Created by: Rjohnson11