## anonymous 4 years ago How do you find the area to a quadrilateral when it is not drawn to scale?

1. anonymous

use given information, such as angles

2. Mertsj

Could we see a picture?

3. anonymous

Given the dimensions, use the formula: A = bh

4. anonymous

|dw:1326933862189:dw|

5. anonymous

The bottom number is a 6

6. Mertsj

Well, you have 4 right triangles and you are given the base and height of each triangle. So use A = 1/2 bh four times and add them together

7. Mertsj

|dw:1326934305163:dw|

8. anonymous

I got an answer of 63. Is that correct

9. anonymous

I forgot to divide by 2

10. anonymous

So if I divide by 2, I get 31.5

11. Mertsj

That's what I got.

12. anonymous

Thanks Mertsj and everyone else.

13. Mertsj

yw

14. anonymous

The midpoint of line QR is M (-2,-6). One endpoint is R (4,-5). Find the coordinates of the other endpoint.

15. Mertsj

From 4 to -2 is left 6. go left 6 more to get to the other end. That would be -8 From -5 to -6 is down 1. Go down one more to get to the other end. That would be -7 So (-8,-7) Now graph it to see if it makes sense.

16. Mertsj

|dw:1326934761999:dw|

17. anonymous

Yes, we got the same thing. This is a rise run problem. Thank you again

18. Mertsj

yw

19. anonymous

|dw:1326934938444:dw|

20. anonymous

In the diagram, PQRS is a rhombus. What are the values of x and y?

21. Mertsj

What is this thing?

22. Mertsj

so all sides are equal. So write that 2x=x+5 and solve it.

23. anonymous

2x = x + 5 2x -x = 5 x = 5

24. Mertsj

yep

25. anonymous

Is that all? It feels like I need to do more

26. anonymous

How do I find y?

27. Mertsj

The diagonals of a rhombus are perpendicular and so now that you know one of the sides, you can use the pythagorean theorem

28. Mertsj

|dw:1326935721082:dw|

29. anonymous

30. Mertsj

yes

31. anonymous

Thanks again. That's all for tonight. Again I thank you. Am I able to come on this site every night?

32. Mertsj

yw

33. Mertsj

yes

34. Mertsj

you can come whenever you want

35. anonymous

36. Mertsj

yes y = 6

37. Mertsj

It's a 6-8-10 right triangle. A multiple of the famous 3-4-5- pythagorean triple.