1. Unit 5 Vocab By: Gus Koza

2. Acute angle An angle that is less than 90 degrees.

3. Adjacent angles Two angles that share a side and vertex but don’t overlap each other.

4. Axis An imaginary straight line that goes through any symmetrical shape.

5. Bisecting an angle Dividing an angle in 2 equal parts.

6. Concentric circles Circles that have their centers in the same place. (All of the pictures found are the same.)

7. Congruent figures Figures that have the same size and shape.

8. Consecutive angles Two angles of a polygon that have a common side.

9. Corresponding angles or sides A relative side of two sides. (Same as two figures) (All of the pictures found are the same.)

10. Inscribed

11. Isometry A transformation of a original figure and its image are congruent.

12. Line of reflection A line that is reflected over in a reflection.

13. Mid point The halfway point of a line segment.

14. Obtuse angle An angle that is more than 90 degrees and less than 180 degrees.

15. Ordered number pair Two numbers written in a certain order.

16. Parallel line A line segment that is evenly spaced.

17. Perpendicular At right angles.

18. Perpendicular bisector A line that cuts a line segment in two parts at 90 degrees.

19. Preimage f is a function from domain X to codomain Y. The smaller oval inside Y is the image of f.

20. Reflection The throwing back by the surface of light.

21. Reflex angle More than 180 degrees but less than 360 degrees.

22. Right angle Exactly 90 degrees.

23. Rotation A circular motion around a point.

24. Sector A pie shaped part of a circle.

25. Straight angle Exactly 180 degrees

26. Supplementary angles The two angles of 140 degrees and 40 degrees.

27. Transformation A dramatic change in apperence.

28. Translation Every point is a constant distance.

29. Transversal A line that passes through two lines in the same plane at different points.

30. Vertex A point that describes the corners or intersections of geometric shapes.

31. Vertical angles An angles opposite each other when two lines cross.