1. Three-dimensional Shapes (3D)
These shapes are solid or hollow, you could hold them in your hand.
They have three dimensions: length, width and height.

2. Solid A shape you can hold (3D). A solid has length, width and height.
Examples:
Cube
Cylinder
Sphere
Cone
Prism

3. Surface The curved part of a 3D shape.
Cylinders and cones have surfaces.

4. Face
Part of a 3D shape that is flat.
Example: A cube has 6 faces.

5. Base
The bottom face of a 3D object.
Base

6. Edge The line where two faces meet on a 3D object.
Example: A cube has 12 edges.

7. Corner The point where three or more edges touch.
This cube has 12 corners all together.

8. Vertex (Vertices) The point where three or more edges meet.
This cube has 12 vertices all together.

9. Cube A 3D shape (you can hold it). It has 6 equal square faces.
Cubes in daily life:
A box
Blocks
Dice

10. Cube A three-dimensional shape which has:
6 square faces all the same size
12 edges
8 corners

11. Cube A three-dimensional shape which has:
6 square faces all the same size
12 edges
8 vertices

12. Cube
A three-dimensional shape which has 6 square faces all the same size, 12 edges and 8 vertices.
Some faces parallel
Some edges parallel
Some faces perpendicular
Some edges perpendicular

13. Sphere A 3D shape (you can hold it) that can roll.
A Sphere has no corners or edges
Spheres in daily life:
A Ball
A Globe
A Marble

14. Sphere
A perfectly round three-dimensional shape, like a ball. It has only one curved surface.
A sphere has
0 faces
0 edges
0 corners

15. Sphere
A perfectly round three-dimensional shape, like a ball. It has only one curved surface.
A sphere has
0 faces
0 edges
0 vertices

16. Cone A 3D shape (you can hold it) that can roll.
A Cone has a circle at its base and a curved surface that comes to a point at its top (vertex).
Cones in daily life:
Ice Cream Cone
A Party Hat

17. Cone A three-dimensional shape made up of:
a circular base
a curved surface that comes to a point at the top (vertex).
A Cone has 0 edges and 0 corners.

18. Cone A three-dimensional shape made up of:
a circular base
a curved surface that comes to a point at the top (vertex).
A Cone has 0 edges and 0 vertices.

19. Cylinder A 3D shape (you can hold it) that can roll.
A Cylinder has 2 equal circles on its ends.
Cylinders in daily life:
A Soup Can
A Roll of Toilet Paper

20. Cylinder
A three-dimensional shape with one curved surface and 2 equal circles on its ends.
A Cylinder has 2 faces, 1 surface, 0 edges and
0 corners.

21. Cylinder
A three-dimensional shape with one curved surface and 2 equal circles on its ends.
A Cylinder has 2 faces, 1 surface, 0 edges and
0 vertices.

22. Pyramid
A three-dimensional shape which has a polygon for its base and triangular faces which meet at one point (vertex).

23. Rectangular Prism A 3D shape (you can hold it).
It has 6 rectangular faces.
Cubes in daily life:
A Kleenex Box
A Refrigerator
A Cereal Box

24. Rectangular Prism A 3D shape that has: 6 rectangular faces 12 edges
2 of those faces are equal
12 edges
8 corners

25. Rectangular Prism A 3D shape that has: 6 rectangular faces 12 edges
2 of those faces are equal
12 edges
8 vertices

26. Rectangular Prism A 3D shape that has: 6 rectangular faces
2 of those faces are equal
12 edges
8 vertices
Some faces are parallel
Some edges are parallel
Some faces are perpendicular
Some edges are perpendicular

27. Two-Dimensional Shapes (2D)
These shapes are flat and can only be drawn on paper.
They have two dimensions: length and width.
They are sometimes called plane shapes.

28. Sides The lines you can trace and count on the outside of a 2D shape.
Example: A triangle has 3 sides. A square has 4.

29. Polygons
Two-dimensional shapes that have three or more sides made from straight lines.
Examples:
triangles
squares
rectangles

30. Quadrilaterals
Any two-dimensional shapes (polygon) with 4 straight sides and 4 angles
Ex.
rhombus kite
rectangle trapezoid
square

31. Quadrilaterals
Any two-dimensional shapes (polygon) with 4 straight sides and 4 angles
The interior angles of a Quadrilateral add up to 360 degrees.
Ex.
rhombus kite
rectangle trapezoid
square

32. Parallelogram
A quadrilateral with parallel opposite sides of equal length.
Opposite angles are equal.

33. Rectangle
A 2D shape with 4 corners and 2 pairs of opposite, equal, parallel sides.
Rectangles in daily life:
A Door
A Piece of Paper

34. Rectangle
A 2D shape with 4 corners and 2 pairs of opposite, equal, parallel sides.
The sides meet at right angles.

35. Rhombus
A 2D shape with four sides.

36. Rhombus A 2D, four-sided shape with opposite sides that are parallel.
All the sides are the same length.

37. Rhombus A 2D, four-sided shape with opposite sides that are parallel.
All the sides are the same length.
Diagonals of a Rhombus bisect each other at right angles.

38. Trapezoid A 2D shape (polygon) with four sides.
One pair of sides is parallel.

39. Trapezoid A 2D shape (polygon) with four sides.
One pair of sides is parallel.

40. Circle A 2D shape with no corners or edges. Circles in daily life:
A Clock

41. Semicircle A 2D shape that is exactly half of a circle.
Semicircles in daily life:
Half of a pie
Half of a pizza

42. Square 2D shape with 4 equal sides and 4 corners
Squares in daily life:
A Window
Some Floor Tiles
Some Ceiling Tiles

43. Square 2D shape (polygon) with 4 equal sides and 4 right (90°) angles.
Opposite sides are parallel.

44. Triangle
Two-dimensional shape with three straight sides and three corners.
Triangles in daily life:
The front of a tent

45. Triangle
Two-dimensional shape (polygon) with three straight sides and three angles.
There are
isosceles triangles,
right triangles
equilateral triangles
scalene triangles

46. Triangle
Two-dimensional shape (polygon) with three straight sides and three angles.
The interior angles of a triangle add up to 180 degrees.
There are
isosceles triangles,
right triangles
equilateral triangles
scalene triangles

47. Patterns
A repeating design.
Examples:
A B
A A B
Growing

48. Line
A long, thin mark that continues forever.
It has no endpoints.

49. Line An infinitely long, thin, two-dimensional mark
It has no endpoints.

50. Parallel Lines that are the same distance apart from each other.
These type of lines stay the same distance apart for their whole length. They do not need to be straight or the same length.
They never intersect.

51. Perpendicular
Lines that intersect at a perfect right angle (90º) to one another.
In solid shapes, edges could be at a right angle to one another.
Faces could also be at right angles to one another.

52. Intersecting
Crossing over one another.
These lines are intersecting.

53. Line Segment A section of line bounded by two endpoints.
A line segment is not continuous.

54. Point
A single position in space (dot).

55. Distance
The length between two points or objects. A B

56. Angles
A shape formed by two lines or rays that extend from a common point (vertex).
The amount of turning between two lines that meet at a common point (vertex).

57. Vertex (angles)
The common point between two or more rays or line segments.

58. Acute Angle
An angle that measures less than 90 degrees.

59. Right Angle
An angle whose measure is exactly 90 degrees.

60. Obtuse Angle
An angle whose measure is more than 90 degrees.

61. Straight Angle An angle whose measure is exactly 180 degrees.
A straight line.

62. Interior Angles
Any angle inside a polygon.

63. Congruent
Two figures are congruent if they have the same shape and size.
Two angles are congruent if they have the same measure.

64. Vertical Angles
A pair of angles directly opposite each other formed by the intersection of straight lines.
Vertical angels are congruent (equal).

65. Isosceles Triangle
A triangle with equal sides and 2 equal angles

66. Equilateral Triangle
A triangle with equal sides and 3 equal angles.

67. Right Triangle
A triangle with one right angle (90 degrees).

68. Scalene Triangles
A triangle with 3 different side lengths and 3 different angle measures.

69. Symmetry
An object is symmetrical when you can fold it in half and the two halves are congruent.
One half is a mirror image of the other.

70. Symmetrical Not Symmetrical