Download GEOMETRY Point: has no dimension, no length, width. Point Line

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Point: has no dimension, no length, width.
Point
Line: has one dimension and no end.
Line
Plane: has 2 dimensions.
Plane
Collinear points: points that lie on the same line.
Collinear points
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Coplaner points: points that lie on the same plane.
Coplaner points
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Segment: a line that has two end point.
Segment
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Ray: part of a line with only one end point.
Ray
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Congruent: same; equal.
Congruent
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Angle: two rays that share the same end point.
Angle
10. Interior: inside.
Interior
11. Exterior: outside.
Exterior
12. A cute angle: measure between 0°&90°.
A cute angle
13. Right angle: measure exactly 90°.
Right angle
14. Abtuse angle: measure between 90°&180°.
Abtuse angle
15. Straight angle: measure exactly 180°.
Straight angle
16. Adjacent angle: 2 angles that share a common vertex and side, but don’t have no
common interior angle.
Adjacent angle
17. Midpoint: the point that bisect a segment.
Midpoint
18. Segment bisector: a segment；ray; line or plane intersect a segment at midpoint.
Segment bisecter
19. Compass: Tool for draw the arc.
Compass
20. Vertical angle: 2 angle that share a common vertex and the sides from 2 pairs
of opposite rays.
Vertical angle
21. Linear angle: 2 adjacent angles whose non-common sides are opposite rays.
Linear angle
22. Complementary angles: 2 angles whose sum is 90°.
Complementary angles
23. Supplementary angles: 2 angles whose sum is 180°.
Supplementary angles
24. Circumference: distance around a circle.
Circumference
25. Rectangle: a quadrilateral who have 4 right angles.
Rectangle
26. Square: a quadrilateral that has 4 right angles and 4 equal sides.
Square
27. Converse: switch the hypothesis and conclusion.
28. Inverse: negate the hypothesis and conclusion.
29. Contrapositive:
negate then switch the hypothesis and conclusion of a
conditional statement.
30. Perpendicular lines: 2 lines that intersect to form a right angle.
Perpendicular lines
31. Rhombus: a parallelogram with 4 equal sides.
Rhombus
32. Trapezoid: a quadrilateral with exactly one pair of parallel sides.
Trapezoid
33. SSS (side-side-side): if the lengths of the corresponding sides (all 3 pairs) of 2
triangles are proportional, then the triangles are congruent.
SSS
34. SAS (side-angle-side): if an angle of one triangle are congruent to an angle of
second triangle and the lengths of the sides including these angles are
proportional, then the triangles are congruent.
SAS
35. Dilation: a transformation where an object is enlarged or reduced.
Dilation
36. Circle: the set of all points in a plane that are equidistant from a given point.
Circle
37. Center: point in the middle of the circle.
Center
38. Radius: distance from the center of a circle to a point on the circle.
Radius
39. Diameter: a chord through the center of the circle.
Diameter
40. Chord: a segment whose endpoints are on the circle.
Chord
41. Secant: a line that intersect a circle in 2 points.
Secant
42. Tangent: line that intersect a circle in exactly one point.
Tangent
43. Tangent circle: circle that intersect in one point.
Tangent circle
44. Central angle: angle whose vertex is the center of the circle.
Central angle
45. Arc: a piece of circle，measured in degrees.
Arc
46. Minor arc: part of a circle that measures less than 180°.
Minor arc
47. Major arc: part of a circle that measure between 180°and 360°.
Major arc
48. Semicircle: half of a circle.
Semicircle
49. Polyhedron: a solid bounded by polygons that enclose a single region of shape.
Polyhedron
50. Faces: the polygons.
Faces
51. Edges: segment formed by 2 intersection faces.
Edges
52. Vertex: point where three or more edges intersect.
Vertex
53. Prism: 2 congruent faces in parallel planes.
Prism
54. Pyramid: has 1 base all other edges connect at the same vertex.
Pyramid
55. Cone: like a pyramid, but base is a circle.
Cone
56. Cylinder: have 2 parallel circle bases.
Cylinder
57. Sphere: like a ball.
Sphere
58. Regular polyhedron: all faces are congruent.
Regular polyhedron
59. Tetrahedron: 4 equilateral triangle faces.
Tetrahedron
60. Cube: 6 square faces.
Cube
61. Octahedron: 8 equilateral triangle faces.
Octahedron
62. Dodecahedron: 12 pentagon faces.
Dodecahedron
63. Icosahedrons: 20 equilateral triangle faces.
Icosahedrons
64. Lateral faces: the faces that are not bases.
Lateral faces
65. Lateral edges: the edges that are not edges of base.
Lateral edges
66. Volume: the amount of space inside the solid.
Volume
67. Hemisphere: half of a sphere.
Hemisphere
68. Skew line: lines that are not parallel and do not intersect in space.
Skew line
69. Rotation: turn.
Rotation
70. Triangle: have 3 sides.
Triangle
71. Pentagon: have 5 sides.
Pentagon
72. Hexagon: have 6 sides.
Hexagon
73. Heptagon: have 7 sides.
Heptagon
74. Octagon: have 8 sides.
Octagon
75. Decagon: have 10 sides.
Decagon
----Lucy