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Geometry

Geometry . By: Emily Spoden. Trapezoid. I’m a quadrangle that always has one pair of parallel lines. Rectangle. I’m a parallelogram with four right angles. I always have four sides and have two pairs of parallel lines. Pentagon. I am a polygon with 5 sides. Octagon .

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Geometry

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  1. Geometry By: Emily Spoden

  2. Trapezoid • I’m a quadrangle that always has one pair of parallel lines.

  3. Rectangle • I’m a parallelogram with four right angles. • I always have four sides and have two pairs of parallel lines.

  4. Pentagon • I am a polygon with 5 sides.

  5. Octagon • I am a polygon with 8 sides.

  6. Regular Polygons • I am a polygon whose sides are all the same length and angles are all equal.

  7. Rhombus • A quadrangle whose sides are all the same length.

  8. Ellipse • A circle with two focal points. All ellipses are ovals but not all ovals are ellipses.

  9. Oval • An egg-shaped curved non-polygon.

  10. Quadrangle (Quadrilateral) • I am a polygon that has four sides.

  11. Parallelogram • I am a quadrilateral with two pairs of parallel lines. My opposite sides are congruent.

  12. Scalene Triangle • I am a triangle with sides that are all different lengths. None of my angles are the same measure.

  13. Right Angle • A 90° angle.

  14. Isosceles Triangle • I am a triangle with at least two sides that are sides that are the same length. At least two of my angles have the same length.

  15. Equilateral Triangle • I am a triangle with all the same size sides and all my angles are the same measure.

  16. Geometric Solids • A 3-D shape, such as a prism, cylinder, cone, or sphere. It has a hollow inside despite its name.

  17. Polyhedrons • I am a 3-D figure whose surfaces, or faces, are all formed by polygons and their interiors.

  18. Cylinder • I am a 3-D shape with circular bases that are parallel and congruent and my side is rounded. I am shaped like a can.

  19. Sphere • I am a 3-D circle.

  20. Cone • I am a 3-D shape that has a circular base, curved surface and one vertex, called the apex.

  21. Prism • I am a 3-D solid that has two parallel faces that are congruent polygons and all other faces are parallelograms.

  22. Pyramid • I am a solid in which one face is any polygon and all the other faces are triangles that come together at a point called an apex.

  23. Cube • I am a polyhedron with six square faces. I have eight vertices and twelve edges.

  24. Circle • A set of points that is all the same distance from the center.

  25. Diameter • A line segment that passes through the center of a circle or sphere. It is twice the length of the radius.

  26. Circumference • The distance around a circle or sphere; the perimeter of a circle.

  27. Radius • A line segment from the center of a circle or sphere to any point on the circle or sphere.

  28. Parallel lines • Lines that never meet and the same distance apart. Parallel lines can be line segments, rays and lines.

  29. Perpendicular Lines • Two lines meeting at a right angles. Limes, rays, line segments can be perpendicular.

  30. Intersecting Lines • Meeting or crossing one another. Lines, line segments and rays can intersect.

  31. Line of Symmetry • A line drawn through a figurethat divides it intoparts that lookEXACTLY the samebut facingopposite directions.

  32. Perimeter • The distance around a 2-dimensional figure.

  33. Area • The amount of space inside a closed boundary. It is measured in square inches or centimeters.

  34. Congruent Shapes • Having exactly the same shape and size.

  35. Similar Shapes • Having the exact same shape but not necessarily the same size.

  36. Degree • A unit of measure for angles based on dividing a circle into 360 equal parts. ° Is used to represent degree. 180°

  37. Acute Angle • An acute angle is an angle that is greater than 0° but less than 90°.

  38. Obtuse Angle • An obtuse angle is an angle that is greater than 90° but less than 180°.

  39. Straight Angle • An angle that measures 180°.

  40. 90° Angle • A right angle.

  41. Reflex Angles • An angle that is greater than 180° and less than 360°.

  42. Adjacent Angles • Angles that are next to each other; they have a common side, but no other overlap. They share a vertex.

  43. Vertical Angles(opposite angles) • When two lines intersect, the angles that do not share a common side. Vertical angles have equal measures. They are opposite from each other.

  44. Supplementary Angles • Two angles whose measures equal 180°.

  45. Bar Graph • A graph that uses horizontal or vertical bars to represent data.

  46. Mean • The sum of a set of numbers divided by the number of numbers in the set. The mean is often referred to as the average. 45+47+52+55+58+60+69=455 455/7=60 60 is the mean.

  47. Maximum • The greatest number in a set of data. 12, 15, 21, 26, 30, 32, 34

  48. Minimum • The smallest number in a set of data. 47, 45,34,58, 56, 67, 90, 78,

  49. Mode • The value or values that occur most often in a set of data. 67, 69, 78, 45, 67, 58, 34, 53, 26

  50. Median • The middle value in a set of data when the data is listed from smallest to largest. 56, 59, 64, 67, 68, 71, 73, 75, 80

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