Angles, Lines, and Polygons Vocab
__1. acute angleA. the sum of their measures equal 90 degrees
__2. complementary anglesB. angle greater than 90 degrees
__3. congruentC. the sum of their measures equal 180 degrees
__4. degreesD. lines that intersect at right angles
__5. obtuse angleE. two lines in a plane that never intersect
__6. parallel linesF. the point where the two rays of an angle meet
__7. perpendicular linesG. units used to measure angles
__8. right angleH. angle less than 90 degrees
__9. supplementary anglesI. two angles with the same measure
__10. vertexJ. angle exactly 90 degrees
__11. equilateral triangleA. at least two congruent sides
__12. isosceles triangleB. closed figure with four sides and four angles
__13. parallelogramC. parallelogram with 4 congruent sides and 4 right angles
__14. quadrilateralD. a line that intersects two or more other lines
__15. rhombusE. parallelogram with 4 congruent sides
__16. scalene triangleF. quadrilateral with both opposite sides parallel and congruen
__17. squareG. quadrilateral with exactly one pair of parallel sides
__18. transversalH. three congruent sides
__19. trapezoidI. no congruent sides
__20. triangleJ. three line segments that intersect at their endpoints
__21. 180 degreesA. Polygon with 6 sides
__22. 360 degreesB. Polygon with 7 sides
__23. 540 degreesC. Polygon with 9 sides
__24. DecagonD. Polygon with 10 sides
__25. HeptagonE. Polygon with 5 sides
__26. HexagonF. Polygon with 8 sides
__27. Interior angle sum formulaG. (n-2)*180
__28. NonagonH. Interior Angle sum for a Quadrilateral
__29. OctagonI. Interior Angle sum for a Pentagon
__30. PentagonJ. Interior angle sum for a Triangle
__31. Alternate Exterior AnglesA. Same side of transversal, outside parallel lines
__32. Alternate Interior AnglesB. Opposite sides of transversal, Inside parallel lines
__33. Co-Exterior AnglesC. same side of transversal corresponding positions
__34. Co-interior AnglesD. opposite each other, congruent
__35. Complementary KeyE. Same side of transversal, inside parallel lines
__36. Corresponding AnglesF. Opposite sides of transversal, outside parallel lines
__37. Supplementary keyG. angle 1 + angle 2 = 180
__38. Triangle KeyH. angle 1 + angle 2 = 90
__39. Vertical AnglesI. Angle 1 = Angle 2
__40. Vertical KeyJ. Angle 1 + angle 2 + angle 3 = 180
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