Math Plane Geometry

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Author:
Rayna
ID:
267258
Filename:
Math Plane Geometry
Updated:
2014-09-18 13:51:28
Tags:
Math
Folders:
Math
Description:
Geometry terms, 7th grade Math Abeka
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  1. :represented by a dot
    point
  2. :a group of points having to endpoints
    line segment
  3. :describes segments or angles of the same length, shape or size
    congruent  ≃
  4. :a group of points having no endpoints
    line

    (A line extends indefinitely in two opposite directions.)
  5. :a group of points having one endpoint
    ray

    (A ray extends indefinitely in one direction.)
  6. :two rays that share a common endpoint
    angle
  7. : a common endpoint where two rays or sides of a polygon meet, usually labled with capital letters
    vertex
  8. : a 90 degree angle with a square corner
    right angle
  9. :lines that cross each other at some point
    intersecting lines
  10. :intersecting lines that form four right angles
    perpendicular lines
  11. :lines that never intersect
    parallel lines
  12. :does not have a point of intersection
    simple closed shape
  13. symbol :have the same shape but not the same size
    similar shapes  ˜
  14. :simple closed shape made up of line segments
    polygon
  15. :a three sided polygon
    triangle
  16. :a four-sided polygon
    quadrilateral
  17. :a quadrilateral having opposite sides that are parallel
    parallelogram
  18. : a parallelogram having four right angles
    rectangle
  19. : a rectangle having four congruent sides
    square
  20. : a parallelogram having four congruent sides
    rhombus
  21. :a quadrilateral having only one set of opposite sides that are parallel
    trapezoid
  22. :a five sided polygon
    pentagon
  23. :a six-sided polygon
    hexagon
  24. :a seven-sided polygon
    heptagon
  25. :an eight-sided polygon
    octagon
  26. Formula Perimeter Rectangle/parallelogram
    P = 2l + 2w
  27. Formula Perimeter square
    P = 4s
  28. Formula Perimeter Triangle
    P = a + b + c
  29. Formula Area Rectangle
    A = bh
  30. 1 square foot (sq. ft.) =        sq. in.
    144 sq. in.
  31. 1 acre (a.) =      sq. ft.
    43,560 sq. ft.
  32. 1 square Yard (sq. yd.) =     sq. ft.
    9 sq. ft.
  33. 1 square mile (sq. mi.) =     acres
    640 acres
  34. Area Square
    A = s2
  35. Area of Parallelogram
    A = bh
  36. Area of Triangle
    • A = b h
    •        2
    • 1/2 x base x height
  37. Area of Trapezoid
    • A = H(b1+b2)
    •           2
  38. Right Angle
    900

  39. Formula sides of right triangle
  40. Acute Angle
    Less than 90o
  41. Angle that measures more than 90o
    obtuse angle
  42. angle that measures 180o
    straight angle
  43. triangle that has two congruent sides and two congruent angles
    isosceles triangle
  44. triangle that has three congruent sides and angles
    equilateral triangle
  45. Name of an instrument that is used to measure the number of degrees in an angle.
    protractor
  46. Half of a circle is called a?
    How many degrees is it?
    • semicircle
    • 180o
  47. The line segment that goes through the center of a circle and has both endpoints on the circle?
    diameter
  48. The length of a straight line drawn from the center to a point on a circle?
    radius
  49. Degrees in a circle?
    360o
  50. Formulas for circumference of a circle?

    distance around a circle
  51.  =
    • 3.14
    • 3 1/7
  52. Formula for area of a circle?
  53. Formula area of regular polygon

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