## gabbyalicorn one year ago What is the perimeter of the figure to the nearest hundredth of an inch? A. 68.24 inches B. 43.12 inches C. 38.56 inches D. 26 inches

1. gabbyalicorn

posting pic right now...

2. gabbyalicorn

3. triciaal

add the lengths all around the figure

4. gabbyalicorn

34

5. triciaal

|dw:1433136112597:dw|

6. anonymous

what do you think the answer is? @gabbyalicorn

7. triciaal

|dw:1433136200589:dw|

8. gabbyalicorn

so... -3- i think the first 1 is 25.12 and then the second one is 94.2

9. anonymous

to find the circumference of the circle, divide it by two since it is a half circle then add the perimeter of the rectangle like @triciaal is showing you

10. triciaal

stop and think the answer to 2 decimal places

11. anonymous

if i am right because i am kind of having trouble a little lol

12. gabbyalicorn

so 47.1 i divided 94.2 by 2

13. gabbyalicorn

its close 2 b

14. triciaal

@YoungTrilogyFT3 correct explanation minor adjustment only 3 sides of the rectangle and add the semicircle

15. gabbyalicorn

I still dont get it

16. gabbyalicorn

@geerky42 @MonKiwi @UsukiDoll

17. triciaal

it is very rude to tag other people when you are being helped instead of saying what you need more help with.

18. gabbyalicorn

Oh, sorry. :( i did not know it would offend you @triciaal

19. gabbyalicorn

but you are right... forgive me

20. geerky42

Your goal is to find length of that red line.|dw:1433133208001:dw|

21. geerky42

You can do so by "split" line into sommething like this:|dw:1433133292825:dw|

22. geerky42

then you only have to calculate perimeter of semicircle then add side length of that rectangle.

23. gabbyalicorn

is there a way to check it like for ex (just making this up) 68.24 - 47.1 or something like that?

24. geerky42

Not that I know of.

25. gabbyalicorn

Okay.

26. gabbyalicorn

well the semi-circle is 34

27. gabbyalicorn

wait no thats for the rectangle

28. geerky42

Well, so what I said, is it clear? can you find total perimeter now?|dw:1433133488047:dw|

29. geerky42

First, what is perimeter of semicircle with radius 4?

30. gabbyalicorn

8?

31. geerky42

How?

32. gabbyalicorn

|dw:1433133602296:dw|

33. geerky42

I said perimeter of semicircle

34. geerky42

|dw:1433133652499:dw|

35. gabbyalicorn

|dw:1433133676207:dw|

36. geerky42

Do you know how to do that?

37. gabbyalicorn

no, im still confused

38. geerky42

it's half the circumference

39. geerky42

Right?

40. geerky42

And you know that $$C = 2\pi r$$ So half circumference would be $$\dfrac{C}{2} = \pi r$$

41. geerky42

Here, we have radius of 4, so what's half the circumference?

42. gabbyalicorn

12.56

43. gabbyalicorn

what i did wad 2 x 3.14 x 4 divided by 2

44. geerky42

Yep. |dw:1433133891727:dw| Now what about rectangle sides?|dw:1433133936113:dw|

45. gabbyalicorn

9+8+9= 26 so then im guessing to do $12.56 \div 26$

46. geerky42

Why divide?

47. gabbyalicorn

I have no clue, im just trying to figure out what operation. so if its not division its multipulcation am i right?

48. geerky42

You have 2 apples and you have other three apple. To find total apple, you don't do division, right? You would use addition.

49. gabbyalicorn

you're right I just multiplied and the answer was way off.

50. gabbyalicorn

38.56

51. gabbyalicorn

omg C

52. gabbyalicorn

:DDD hazaaa!

53. geerky42

|dw:1433134238968:dw|

54. gabbyalicorn

Thank you thank you thank you so much! @geerky42 and @triciaal im sorry it took me a while

55. geerky42

It's cool, and welcome!

56. gabbyalicorn

You never gave up on me :D