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1.
acute angle: an angle that is less than 90 degrees

2.
line segment: part of a line that has two endpoints

3.
obtuse angle: an angle that is more than 90 degrees and less than 180 degrees

4.
paralellogram: a quadrilateral that has 2 pairs of parallel sides

5.
perpendicular lines: two lines that intersect to form 4 right angles

6.
polygon: is a closed plane figure formed by three or more sides

7.
ray: part of a line that has one endpoint and extends endlessly in the other direction

8.
rhombus: a parallelogram with all sides congruent

9.
right angle: an angle that measures exactly 90 degrees

10.
trapezoid: a quadrilateral with exactly one pair of parallel sides

## Geometry-3rd GradeStudy online at quizlet.com/_2691g |

table

glossary

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