## anonymous one year ago Find the area and perimeter. (Drawing will be post in Comment)

1. anonymous

|dw:1441474437167:dw|

2. calculusxy

|dw:1441474560262:dw|

3. anonymous

|dw:1441474590229:dw|

4. anonymous

Wait let me calculate the area.

5. calculusxy

The first image that you have shown is a composite figure, meaning that it is made up of many different shapes. I have divided the shape into simpler figures so that you can easily find the area of each divided shapes and then add it all together to get the final area. The perimeter should be fairly easy as well because you just have to add all of the measurements of the sides together.

6. calculusxy

|dw:1441474779558:dw| I juts labeled all of the divided figures for an easier time to calculate the areas.

7. anonymous

|dw:1441474799967:dw|

8. calculusxy

For figure C, you have to multiply 15 x 3. Does that equal to 30, like you said?

9. anonymous

I multiply 10x3

10. anonymous

|dw:1441474915511:dw|

11. calculusxy

Yes that is now correct. You need to now add up all of the areas of figures A, B, and C.

12. anonymous

|dw:1441474983967:dw|

13. calculusxy

Great! That is the area of the first figure: 111m^2. Now for the perimeter add up all of the side measurements |dw:1441475068227:dw|

14. anonymous

|dw:1441475085978:dw|

15. calculusxy

|dw:1441475172755:dw|

16. calculusxy

Add the 6m as well because we forgot the other missing side length.

17. anonymous

18. calculusxy

Area of trapezoid: $\large \frac{ 1 }{ 2 }(b_1 + b_2)\times h$

19. calculusxy

|dw:1441475363048:dw|

20. anonymous

Can you wait? I gotta go eat.

21. calculusxy

A side note, the b_1 and the b_2 in the formula can be either one. There is no certain designation because it will equal to the same thing once you add it (according to the commutative property of addition).

22. calculusxy

I am sorry, I cannot. I have to go soon.

23. anonymous

@calculusxy I'm back :))

24. calculusxy

Great :) Now did you find the area.

25. anonymous

Wait, how can i find the area? There's 2 base

26. calculusxy

Did you look at the picture and the formula that I gave you?

27. anonymous

Ohh ok i got this. :D Check my answer

28. anonymous

A=77.5

29. calculusxy

That's correct!

30. anonymous

Yay! :D Thanks for everything @calculusxy ^_^ I learned something.

31. calculusxy

No problem :) And I always happy to teach and learn from users, like you.

32. calculusxy

*And I AM always happy to teach and learn from users, like you.