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Planar Geometry Terms

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A list of geometry terms, illustrations, and definitions by a sixth grader.

A list of geometry terms, illustrations, and definitions by a sixth grader.

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Transcript

  • 1. Geometry Guide Lines planes points angles
  • 2. Point A dot with a letter
  • 3. Lines A line that goes on for ever f s
  • 4. Line Segment A straight line s m
  • 5. Ray One line that goes on for ever f d
  • 6. Plane A flat end that extends s d a
  • 7. Intersecting Two lines that cross
  • 8. Perpendicular A right angle 90 degrees
  • 9. Parallel Two lines that don't cross
  • 10. Skew Lanes that are not in the same plane
  • 11. Acute A 50 degree angle
  • 12. Obtuse A 180 degree angle
  • 13. Vertex/ Vertice The middle point
  • 14. Right A 90 degree angle
  • 15. Straight A straight angle that equals thats 180 degrees
  • 16. Complementary If the measure is 90 degree 15 75
  • 17. Supplementary If the measure is 180 degrees 100 80
  • 18. Vertical/ Opposite Are opposite two lines interesect r m n p q
  • 19. adjacent Side by side common vertex and ray s t w d f
  • 20. Triangles Obtuse Acute Right Equilateral Isosceles Scalene
  • 21. Obtuse Triangle The greatest angle is the obtuse that equals 180
  • 22. Acute Triangle The greatest angle is an acute angle that equals 180
  • 23. Right Triangle The greatest angle is a right angle that equals 180
  • 24. Equilateral triangle 3 congruent sides
  • 25. Isosceles Triangle At least 2 congruent sides
  • 26. Scalene Triangle No congruent sides
  • 27. Perimeter Add all the sides up 5 5 15 5+5+15=25
  • 28. Sum of Internal Angles The sides and the triangles 4 sides and 2 triangles 2 x 180 = 360
  • 29. Area Time the base and height 10 20 15
  • 30. Quadrilaterals Trapezoid Parallelogram Rectangle Rhombus Square
  • 31. Quadrilateral A box that makes 4 right angles
  • 32. Trapezoid 2 set of parallel line
  • 33. Parallelogram 4 connected sides
  • 34. Rectangle Four right angles
  • 35. Rhombus Four congruent sides
  • 36. Square Congruent sides
  • 37. Area of a Rectangle Times the outside then divided by two 25 10
  • 38. Area of a Square The outside is times then divided 6 8
  • 39. Area of a Parallelogram Times and then divided
  • 40. Area of a Trapezoid The outsides are times then divided 9
  • 41. Circles Chord diameter sector radius
  • 42. Chord Where you draw a line at the top
  • 43. Diameter The middle part of a circle
  • 44. Arc A part of a circle named by two rays with common endpoints. a b
  • 45. Radius The outside of the circle radius
  • 46. Sector A region enclosed by two radii
  • 47. Circumference The distance around a circle 6m.
  • 48. Area of circle The outside of a circle
  • 49. Other Polygons Pentagon hexagon octangon
  • 50. Pentagon It has 5 sides
  • 51. Hexagon All sides are congruent
  • 52. Octogon It has six sides

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