This document provides definitions and descriptions of basic geometry terms including: - Types of angles such as right, acute, and obtuse angles - Geometric shapes such as triangles (right, acute, obtuse, scalene, isosceles, equilateral), quadrilaterals (trapezoid, parallelogram, rectangle, rhombus, square) - Circle components including chords, diameters, arcs, radii, sectors, and circumference - Other polygons with 5 to 10 sides such as pentagons, hexagons, heptagons, octagons, nonagons, and decagons

9. Types of Shapes Quadrilateral Trapezoid Parallelogram Rectangle Rhombus Square

13. Types of Triangles Right Obtuse Acute Scalene Isosceles Equilateral

14. Right Triangle A right triangle is a triangle with one side that is 90 degrees.

15. Acute Triangle An acute triangle is a triangle with the biggest side that is less than 90 degrees.

16. Obtuse Triangle An obtuse triangle is a triangle that the biggest angle is bigger than 90 degrees.

17. Scalene Triangle A triangle that has all different sides.

18. Isosceles Two sides on a triangles that are the same.

19. Equilateral A triangle that all angles are the same.

20. Quadrilateral A type of shape with 4 angles.

21. Trapezoid A shape with 1 set of parallel lines.

22. Parallelogram A shape that has all sides parallel.

23. Rectangle A shape with 2 parallel sides.

24. Rhombus A parallelogram with all sides the equal length.

25. Square A shape with all sides that are equal.

26. Circles Chords Diameter Arc Radius Sector Circumference

27. Chords A straight line between two points of a curve.

28. Diameter A straight line the travels through the middle of a circle.

29. Arc A continuous section in a circle.

30. Radius A straight line that travels half of the circle.

31. Sector A piece of a circle.

32. Circumference The length of a circle. 98

33. Other Polygons Pentagon Hexagon Heptagon Octagon Nonagon Decagon

34. Pentagon A five side polygon.

35. Hexagon A six sided polygon.

36. Heptagon A 7 sided polygon.

37. Octagon An eight sided polygon.

38. Nonagon A nine sided polygon.

39. Decagon A ten sided polygon.

40. The End Thanks for watching!