1. Math Vocabulary Unit 1: Geometry What am I? ©Mrs. DeAmicis - 2009

2. See if you can correctly name the geometry terms!

3. Try using the clues in the sentences to name the term.

4. I am a location in space. What am I called?

5. point!

6. .

7. I am made up of two points and the straight path between them. What am I?

8. line segment!

9. We are the two points in a line segment. What are we?

10. endpoints!

11. I am a straight path that has a starting point and goes on forever in one direction. What am I?

12. ray!

13. I am a straight path that goes on forever in both directions. What am I?

14. line!

15. I am formed by 2 rays or 2 line segments that share the same endpoint. What am I?

16. angle! <

17. I am the point where the rays of an angle, the sides of a polygon, or the edges of a polyhedron meet.

18. vertex

19. I am an angle that measures 90°. What am I called?

20. right angle L

21. I am an angle that measures between 0° and 90°. What am I?

22. acute angle >

23. I am the angle that measures between 90° and 180°. Who am I?

24. obtuse angle ∑

25. I am an angle that measures 180°. What am I?

26. straight angle

27. I am an angle that measures between 180° and 360°. What am I called?

28. reflex angle

29. I am a shape with three sides. What am I?

30. triangle

31. I am a polygon that has four sides and four angles. What am I?

32. quadrangle or quadrilateral

33. How many quadrangles can you name?

35. I am a quadrilateral that has two pairs of parallel sides. My opposite sides are congruent.

36. parallelogram

37. I am a closed, 2- dimensional figure that is made up of line segments joined end to end. My line segments may not cross.

38. polygon

39. I am a polygon in which at least one vertex is “pushed in.” What am I called?

40. concave polygon

41. I am a polygon in which all vertices are “pushed outward.” What am I called?

42. convex polygon

43. I’m a quadrilateral whose sides are all the same length. What is my name?

44. rhombus

45. I am a quadrilateral that has exactly one pair of parallel sides. What am I?

46. trapezoid

47. Well Done!