This document provides definitions and key information about common geometric shapes including: - Lines, line segments, rays, and their relationships such as intersecting, perpendicular, and parallel lines. - Points, and the labeling of points. - Common triangle types such as right, obtuse, acute, scalene, isosceles, and equilateral triangles and their defining characteristics. - Properties of quadrilaterals including trapezoids, parallelograms, rectangles, rhombi, and squares. - Circle elements such as chords, diameters, arcs, sectors, radii, circumference, and calculating area. - Other polygons like hexagons and octagons.

3. Points A Point A B A point is a precise location in space. It is labeled with a letter

4. Line Segments Any straight distance that starts at one spot and ends at another.

21. Trapezoid A quadrilateral with one set of parallel lines

22. Parallelogram A quadrilateral with two sets of parallel sides and opposite sides are congruent.

23. Rectangle A shape with four connected sides and opposite sides are parallel and congruent.

24. Rhombus A shape with four sides that are all congruent.

25. Square A shape with all sides congruent and opposite sides parallel.

26. Area of a rectangle Multiply length times width. Area=105 15in 7in

27. Area of a Square Multiply two of the sides. Area=9ft 3ft 3ft

28. Area of a Parallelogram Length times hight (worksheets will give you a dotted line for hight.) Area=15cm 5cm 3cm

29. Area of a trapezoid Add another trapezoid to make a rectangle. Then multiply length times width. Area= 126 6cm 7cm 3cm

30. Circles Chord Diameter Arc Radius Sector Circumference Area of a circle

31. Chord A line going through a circle.

32. Diameter The distance across a circle. 5cm

33. Arc A piece of the outside edge of a circle

34. Radius Half of the diameter.

35. Sector A piece of the area.

36. Circumference Diameter times 3.14 C=18.84 6cm

37. Area of a circle (Radius times radius) times 3.14 Area=78.5cm 5cm

38. Other polygons Hexagon Octagon Regular Polygon

39. Hexagon A shape with six equal sides.

40. Octagon A shape with eight equal sides.