Unit # 1 Vocabulary Review

1. Unit # 1 Vocabulary Review

2. coordinate plane

3. a plane (2 dimensional) • formed by intersection • of horizonal line ( x axis) • of vertical line (y axis)

6. ordered pair - numbers that identify - a point on - a coordinate plane

8. Why does this represent a plane?

9. plane • flat surface • extends infinitely in all directions • has two dimensions

10. A? B? C?

13. measure of angle What unit is used to measure an angle?

14. Degrees

15. Why type of angle? A? B? C? D? E? F?

16. Right Angle

18. acute angle • an angle • whose measure • is less than 90 degrees

20. obtuse angle • an angle • whose measure is • greater than 90 degrees but • less than 180 degrees

21. Why are these obtuse angles? Obtuse angle

22. What type of angle?

23. What type of angles?

24. complementary angles complementary angles two angles whose measures add to 90 degrees

26. supplementary angles? vertical angles? congruent angles?

27. supplementary angles two angles whose measures have a sum of 180 degrees

28. Why are figure 1 and figure 2 both examples of supplementary angles?

30. vertical angles a pair of opposite congruent angles formed by intersecting lines

32. congruent angles angles that have the same measure

37. What concept do these figures represent?

38. line of symmetry the imaginary “mirror” in line symmetry

40. transformation - transform a change in the size or position of a figure

41. transformations (transform) translations (translate) rotations (rotate) reflections (reflect)

44. reflection

46. translation

48. rotation

50. translation