You are given the values of the coordinates of four points abcd. explain the conditions for these 4 points to (hint: these have something to do with the slope of the lines):
a) form a parallelogram
b) form a rectangle
what is the additional requirement if the four points are to form a square?
can two lines both having negative slope be perpendicular to one another why?

Can two lines both having negative slope be perpendicular to one another. why?

Ans:

Both lines are perpendicular if and only if the product of both gradient equal to -1. If both gradient have negative sign, that’s mean the answer will be in positive sign. Thus, two lines both having negative slope cannot be perpendicular to one another.

1. 3.4/4

2. 0.8/7

3. 0.5 x 3

4. 0.9 x 6

5. 10.8

6. 2.35

7. 0.567

8. 9.35

9. 0.02

10. 0.06

11. 0.16

12. 0.42

13. 0.63

14. 5.6

15. 8.1

16. 9.9

17. 0.28

18. 0.48

19. 0.27

20. 0.49

21. 0.45

22. 0.72

23. 0.9

24. 0.88

25. 0.75

26. 0.16

27. 0.328

28. 0.495

29. 0.72

30. 1.068

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.