1. 8 th grade Vocabulary Word, Definition, model Unit 3

2. MODEL: Unit 3 Adjacent Angles DEFINITION: ADJOINING OR SHARING ONE SIDE.

3. MODEL: Unit 3 Alternate Interior Angles DEFINITION: ANGLES ON THE OPPOSITE SIDE OF THE TRANSVERSAL BUT BETWEEN THE PARALLEL LINES.

4. MODEL: Unit 3 Angle-Angle Criterion DEFINITION: IF TWO CONSECUTIVE ANGLES ARE CONGRUENT TO TWO CONSECUTIVE ANGLES OF ANOTHER TRIANGLE, THEN THE TRIANGLES ARE SIMILAR. THE THIRD ANGLE IS THE SAME IN BOTH TRIANGLES BECAUSE THE SUM OF ALL THE ANGLES IS EQUAL TO 180.

5. MODEL: ALL ORANGES ARE FRUITS, ALL FRUITS GROW ON TREES THEREFORE, ALL ORANGES GROW ON TREES Unit 3 Deductive Reasoning DEFINITION: WHEN SOMEONE COMBINES KNOWN INFORMATION, FACTS, RULES OR PROPERTIES TO DRAW A CONCLUSION.

6. MODEL: Unit 3 Vertical Angles DEFINITION: TWO ANGLES THAT ARE ACROSS THE INTERSECTION OF THE LINES THAT CREATE THEM.

7. MODEL: Unit 3 Center of Rotation DEFINITION: THE FIXED POINT ABOUT WHICH A FIGURE IS ROTATED.

8. MODEL: Unit 3 Clockwise DEFINITION: FROM THE TOP, DOWN AND TO THE RIGHT.

9. MODEL: Unit 3 Counterclockwise DEFINITION: WHEN A FIGURE MOVES FROM A POINT, TO THE LEFT AND DOWN AS IN THE OPPOSITE OF THE HANDS OF A CLOCK.

10. MODEL: Unit 3 Congruence DEFINITION: FIGURES THAT HAVE THE SAME SIZE AND SHAPE.

11. MODEL: Unit 3 Dilations DEFINITION: TO TRANSFORM A FIGURE BY CHANGING ITS SIZE SHRINKING OR STRETCHING ITS DIMENSIONS. SHAPE WILL NOT CHANGE.

12. MODEL: Unit 3 Image DEFINITION: A FIGURE AFTER IT HAS BEEN TRANSFORMED. THE FINAL FIGURE.

13. MODEL: Unit 3 Interior Angles DEFINITION: AN ANGLE THAT IS WITHIN A FIGURE OR BETWEEN PARALLEL LINES.

14. MODEL: Unit 3 Line of Reflection DEFINITION: THE LINE OVER WHICH A FIGURE IS FLIPPED. ALL POINTS ARE EQUIDISTANT (AND OPPOSITE) FROM THIS LINE.

15. MODEL: Unit 3 Parallel Lines DEFINITION: LINES THAT ARE ALWAYS THE SAME DISTANCE APART.

16. MODEL: Unit 3 Pre-image DEFINITION: THE INITIAL IMAGE BEFORE A FIGURE IS TRANSFORMED IN SOME WAY.

17. MODEL: Unit 3 Reading A’ as A prime DEFINITION: IF A IS THE INITIAL SET THEN A' (READ A PRIME) IS THE SET AFTER AN APPLIED CHANGE.

18. MODEL: Unit 3 Similarity DEFINITION: WHEN POLYGONS HAVE THE SAME SHAPE; CORRESPONDING ANGLES ARE EQUAL BUT SIDES ARE PROPORTIONAL. (SAME SHAPE, DIFFERENT SIZE)

19. MODEL: Unit 3 Reflections DEFINITION: A FIGURE OR LINE DESIGN HAS REFLECTION SYMMETRY IF YOU CAN DIVIDE THE DESIGN INTO HALVES THAT ARE MIRROR IMAGES.

20. MODEL: Unit 3 Rigid Transformations DEFINITION: TRANSFORMATIONS OF A FIGURE THAT DO NOT CHANGE ITS SHAPE OR SIZE.

21. MODEL: Unit 3 Exterior Angles DEFINITION: THE ANGLE FORMED WHEN ONE SIDE IS EXTENDED BEYOND ITS ADJACENT SIDES.

22. MODEL: Unit 3 Rotations DEFINITION: TO TURN A FIGURE A SPECIFIED NUMBER OF DEGREES WHILE HOLDING ONE POINT FIXED OR CONSTANT. THIS FIGURE DOES NOT CHANGE SIZE OR SHAPE.

23. MODEL: Unit 3 Scale factor DEFINITION: THE CONSTANT THAT INCREASES ALL VALUES OF A FIGURE IN A PATTERN.

24. MODEL: Unit 3 Supplementary DEFINITION: TWO ANGLES ARE THIS IF THE SUM OF THEIR MEASURES IS 180 DEGREES.

25. MODEL: Unit 3 Complementary DEFINITION: ANGLES WHOSE MEASURES ADD TO 90 DEGREES.

26. MODEL: Unit 3 Corresponding DEFINITION: ANGLES THAT OCCUPY THE SAME RELATIVE POSITION AT EACH INTERSECTION WHERE A STRAIGHT LINE CROSSES TWO OTHERS.

27. MODEL: Unit 3 Translations DEFINITION: TO SLIDE A FIGURE ALONG A STRAIGHT-LINE WITHOUT CHANGING SIZE OR SHAPE.

28. MODEL: Unit 3 Transversals DEFINITION: A LINE THAT CROSSES OTHER LINES. IT MAKES ANGLES THAT CAN BE USED TO DETERMINE OTHER ANGLES.

29. 8 th grade Vocabulary 1.Adjacent 2.Alternate interior Angles 3.Angle-angle criterion 4.Deductive Reasoning 5.Vertical angles 6.Center of rotation 7.Clockwise 8.Counterclockwise 9.Congruence 10.Dilations 11.Image 12.Interior angles 13.Line of reflection 14.Parallel lines 15.Pre-Image 16.Reading A’ as A prime 17.Similarity 18.Reflections 19.Rigid Transformations 20.Exterior angles 21.Rotations 22.Scale factor 23.Supplementary 24.Complementary 25.Corresponding 26.Translations 27.Transversals