1. Geometry
The Shapes Around Us

2. Line

3. Line Segment

4. Ray

5. Parallel Lines

6. Intersecting Lines

7. Perpendicular Lines

8. Circle

9. Chord

10. Diameter

11. Radius

12. Polygons
straight lines
closed

13. Triangle
3 sides

14. Quadrilateral
4 sides

15. Pentagon
5 sides

16. Hexagon
6 sides

17. Octagon
8 sides

18. Rectangle
4 sides
opposite sides same length
4 right angles

19. Square
4 equal sides
4 right angles

20. Rhombus
4 equal sides
2 pairs of parallel sides

21. Trapezoid
1 pair of parallel sides

22. Cube

23. Cone

24. Pyramid

25. Sphere

26. Rectangular Prism

27. Cylinder

28. Triangular Prism

29. Right Angle
Formed by perpendicular lines.
Measures 90°

30. Obtuse Angle
Has a measure greater than 180°

31. Acute Angle
Has a measure less than 90°

32. Isosceles Triangle
At least two sides or angles that are equal.

33. Equilateral Triangle
Three sides and angles that are equal.

34. Scalene Triangle
No sides or angles that are equal.

35. Obtuse Triangle
Has one obtuse angle.

36. Acute Triangle
Has three acute angles.

37. Right Triangle
Has one right angle.

38. The End