basics of geometry with practical images
- 2. - the branch of mathematics that is concerned with the properties and relationships of: - points, lines, angles, curves, surfaces, and solids. - The visual study of shapes, sizes, patterns, and positions.- The visual study of shapes, sizes, patterns, and positions.
- 4. Different Types: Line Line Segment Line Segment Ray Perpendicular Parallel Intersecting
- 5. Has no beginning or end. Continues indefinitely in both directions. Can be illustrated by drawing arrows at each end.
- 6. Has a beginning point and an end point. Line segments on a shape are called sides. Can be found in many shapes. Can be found in many shapes.
- 7. Has a beginning point but no end point.
- 8. Lines in the same plane that do not intersect or crossintersect or cross each other.
- 9. Two or more lines that meet at a point.
- 10. Perpendicular lines form a right or 90 degree angle.
- 11. Made up of two rays with the same start point. The start point is called the vertex. The two rays are called the sides of the angle. The two rays are called the sides of the angle.
- 12. A Protractor.
- 13. Zero Angles Right Angles Acute Angles Acute Angles Obtuse Angles Straight Angles SupplementaryAngles ComplimentaryAngles
- 14. Are Parallel and equal 180 degrees.
- 15. Two rays that create a 90 degree angle.
- 16. Two rays that have a smaller angle than a right angle. <90 Degrees
- 17. Angles larger than a right angle and smaller than two right angles. >90 Degrees
- 18. Angles equal to two right angles.
- 19. Two angles that sum to a straight angle
- 20. Two angles that sum to one right angle
- 23. Plane Figure: A two-dimensional shape (2D). A shape on a plane. IncludesIncludes points, lines, polygo ns, circles, triangles , hexagon, pentago ns, etc. A plane figure is any set of points on a plane.
- 24. Quadrilateral- a plane figure having four sides and four angles. Parallelograms - a quadrilateral having both pairs of opposite sides parallel to each other.pairs of opposite sides parallel to each other.
- 25. Equilateral Triangle Three equal sides Three equal angles, always 60° Isosceles Triangle Two equal sides Acute Triangle All angles are less than 90° Right Triangle Has a right angleTwo equal sides Two equal angles Scalene Triangle No equal sides No equal angles Has a right angle (90°) Obtuse Triangle Has an angle more than 90° Right Isosceles Triangle Has a right angle (90°), and also two equal angles
- 28. Space figures are three dimensional figures. Faces: Side of the space figure Edges: Where two faces meet Vertex or Vertices: the corners of the space figures EDGE FACE Vertex or Vertices: the corners of the space figures VERTEX
- 29. Activity! Take out the papers in front of you and make each item you see.
- 30. I have a Name!
- 32. Repeating a shape over and over and over and over and over and over again, leaving no gaps Tesselation over again, leaving no gaps between each shape to form a BIGGER shape. Another word for “tesselation” is TILING!
- 35. Symmetry Symmetry is having two sides of a whole look like they reflect each other. Line of Symmetry
- 36. Something that is not symmetrical. Asymmetry