## anonymous 5 years ago What is the area of the shaded portion within the square? Answer: a. 156 m^2 b. 144 m^2 c. 84 m^2 d. 60 m^2 e. Not enough information to answer

1. anonymous

cant see

2. anonymous

Where is the square... (:

3. anonymous

e

4. anonymous

idont know what happen to it

5. anonymous

Hahaha nice amit

6. anonymous

What is the area of the shaded portion within the square?

7. anonymous

its not allowing it to show

8. anonymous

And you have to save and attach it.

9. anonymous

You have to save and attach it... ^_^

10. anonymous

ok

11. anonymous

12. anonymous

ok

13. anonymous

Do you know how to find the area of a triangle?

14. anonymous

yes

15. anonymous

Good. Can you find for me the area of either one of the two triangles inside the square?

16. anonymous

would i multiply the 12 ans 13 together?

17. anonymous

if yes i got 162

18. anonymous

?

19. anonymous

That is the area of the square.

20. anonymous

so how would i find the area of the triangle?

21. anonymous

Well, you should first use Pythagoras theorem to find the other side of the triangle, which would be $$\sqrt{13^2-12^2}=5$$. Now the area of each triangle is $$1/2(12)(5)=30$$.

22. anonymous

The area of the shaded portion is equal to the area of the square minus the area of the triangles. That's $$12^2-2(30)=84 m^2$$

23. anonymous

how do u get 5 from 13 2 and 12 2

24. anonymous

?

25. anonymous

Use Pythagoras theorem. We have a side of the triangle equal to $$12$$ and the hypotenuse is $$12$$, so the third side is $$\sqrt{13^2-12^2}=5$$.

26. anonymous

I meant the hypotenuse is $$13$$.

27. anonymous

I'm still having a hard time understanding

28. anonymous

?

29. anonymous

hello anyone there

30. anonymous

remyred90 you there?

31. anonymous

yes

32. anonymous

33. anonymous

no

34. anonymous

okay, give me the full question again. I will try to help.

35. anonymous

i understand the last stuff he wrote but i didnt get the last part

36. anonymous

37. anonymous

I think that you don't have enough information. Wouldn't you need to have the lenght of the shaded area first?

38. anonymous

look at what the person that was helping me was writing and c if u understand plzz

39. anonymous

I see that the answer is 84. It makes sense.

40. anonymous

yea but how did he get 84

41. anonymous

i got the part where he got 5 but afta that idk

42. anonymous

2 triangles times 30 (the area of each)=60, and 12 times 12 is 144. Subtract the 60 from the 144 and you get 84.

43. anonymous

ok let me try this plz give me time to understand before u leave me lol

44. anonymous

okay

45. anonymous

thanx

46. anonymous

where did the 30 ccum from?

47. anonymous

well, you use the pythagorem therom. a squared plus b squared equalls c squared.

48. anonymous

i really appreciate ur time

49. anonymous

and the area of a triangle = 1/2 times the base times the height of the triangle.

50. anonymous

No problem. Gotta go bell is ringing.

51. anonymous

ok thanx

52. anonymous

i understand it now thank you so much