1. Lines are parallel if they are always the same distance apart and will never meet. Parallel Lines Parallel lines never meet. Parallel lines have equal distance between them at every point on the lines. What do you mean by parallel? Parallel means ‘never intersects’.

2. A B C D 2.5 mm Parallel Lines Checking Parallel Lines Using Ruler Example 1

3. DC is parallel to AB DC ll AB 2.5 mm Parallel Lines Checking Parallel Lines Using Ruler A B C D Example 1

4. A B C D 2 mm Parallel Lines Checking Parallel Lines Using Ruler Example 2

5. A B C D DC is parallel to AB DC ll AB 2 mm Parallel Lines Checking Parallel Lines Using Ruler Example 2

6. A B C D Parallel Lines Checking Parallel Lines Using Set-square If the side of the set- square has the same angle with CD, Slide the set-square but hold the ruler. Example 1

7. A B C D Parallel Lines Checking Parallel Lines Using Set-square DC is parallel to AB. DC ll AB Example 1 If the side of the set- square has the same angle with CD,

8. A B C D Parallel Lines Checking Parallel Lines Using Set-square If the side of the set- square has the same angle with CD, Slide the set-square but hold the ruler. Example 2

9. A B C D Parallel Lines Checking Parallel Lines Using Set-square DC is parallel to AB. DC ll AB Example 2 If the side of the set- square has the same angle with CD,

10. A F C L CL is parallel to AF CL ll AF Parallel Lines Checking Parallel Lines Example 1 Is AF II CL? YES

11. R B C M CM is parallel to BR. CM ll BR Parallel Lines Checking Parallel Lines Example 2 Is RB II CM? YES

12. E O F N EF is parallel to ON EF ll ON Parallel Lines Checking Parallel Lines Example 3 Is EF II ON? YES

13. A B C D Parallel Lines Checking Parallel Lines Example 4 NO Is AB II CD?

14. E O F N Parallel Lines Checking Parallel Lines Example 5 NO Is EF II On?

15. E O F N Parallel Lines Checking Parallel Lines Example 6 NO Is EF II ON?

16. EF D C Parallel Lines Name the pairs of parallel lines. Example 1

17. A B XY Parallel Lines Name the pairs of parallel lines. Example 2

18. E D C Parallel Lines Name the pairs of parallel lines. Example 3

19. E F D C AB X Y L M N O Paraller Name the pairs of parallel lines. Example 4

20. Parallel Lines Example 1 Step 1: Draw a line along one side of the set- square. Drawing Parallel Lines Using Set-Square and Ruler

21. Step 2: Place a ruler along the other side of the set-square. Then slide the set-square. Parallel Lines Drawing Parallel Lines Using Set-Square and Ruler Example 1

22. Parallel Lines Example 1 Step 3: Draw a line along the side of the set- square. Drawing Parallel Lines Using Set-Square and Ruler

23. Parallel Lines Drawing Parallel Lines Using Set-Square and Ruler Example 2 Step 1: Draw a line along one side of the set- square.

24. Parallel Lines Step 2: Place a ruler along the other side of the set-square. Then slide the set-square. Drawing Parallel Lines Using Set-Square and Ruler Example 2

25. Parallel Lines Drawing Parallel Lines Using Set-Square and Ruler Example 2 Step 3: Draw a line along the side of the set- square.

26. Parallel Lines A B Example 1 anywhere Draw a line parallel to the line AB

27. Parallel Lines A B Example 1 reminder wrong way – putting first the ruler. Draw a line parallel to the line AB anywhere

28. Parallel Lines A B Example 1 anywhere Put first the set- square. Draw a line parallel to the line AB

29. Parallel Lines Draw a line parallel to the line AB A B Example 2 anywhere

30. Parallel Lines1 A B. C Example 1 anywhere through the point C Draw a line parallel to the line AB

31. Parallel Lines Draw a line parallel to the line AB A B. R through the point R Example 2 anywhere

32. Parallel Lines Draw a line parallel to the line AB A B. X through the point X Example 3 anywhere

33. A Perpendicular Reminders B Align properly the line and the side of the set-square.

34. A Perpendicular Reminders B Align properly the line and the side of the set-square.

35. A Perpendicular Reminders B Align properly the line and the side of the set-square.

36. A Perpendicular Reminders B Align properly the ruler and the side of the set-square.

37. A Perpendicular Reminders B Protractor can be used also as a guide.