1. mckenzieandjesus

@jim_thompson5910

2. anonymous

Help with what though?

3. mckenzieandjesus

jim_thompson5910 is helping me through message but he needed to see these images

4. mckenzieandjesus

I need help with this though Find the area of the triangle. 24 square units 11 square units 12 square units 5.5 square units

5. anonymous

Area of a triangle is $\large A=\frac{1}{2}\times height \times base$ The base is going to be the distance between the two bottom points. The height will be the distance between the middle of the base and the top point.

6. mckenzieandjesus

so the base would be 6?

7. anonymous

Correct.

8. mckenzieandjesus

and 5 for height?

9. mckenzieandjesus

so 15?

10. anonymous

Close, it would be 4

11. mckenzieandjesus

oops okay thanku!

12. anonymous

$\huge \color{aqua}N\color{fuchsia}o \space \color{lime}P \color{orange}r \color{blue}o \color{maroon}b \color{red}l \color{olive}e \color{purple}m \ddot\smile$

13. mckenzieandjesus

this is for the 4 circles image A point in the figure is selected at random. Find the probability that the point will be in the part that is NOT shaded.

14. mckenzieandjesus

15. anonymous

Do they give you any units, or no?

16. mckenzieandjesus

@jim_thompson5910

17. mckenzieandjesus

no

18. anonymous

Well as we can see, the lengths of 2 diameters is the same as the length as one side of the square. If we say that the length of the side of the square is 4, then that means that the diameter of a circle is 1/4th that, or 1. Can you figure out the areas from that?

19. mckenzieandjesus

Im confused with this one too, i keep getting an answer thats not on my multiple choice Find the area of the kite. 190.44 m2 126.96 m2 253.92 m2 380.88 m2

20. jim_thompson5910

multiply the diagonals, then divide by 2

21. jim_thompson5910

the diagonal lengths are given in pieces, so you'll have to add them up first

22. mckenzieandjesus

so theres 4 sides to a square 4+4+4+4= 16 and 16/ 1/4= 64 did i do it right?

23. mckenzieandjesus

@jim_thompson5910 all 4 of them?

24. jim_thompson5910

the longer diagonal is 6.9+13.8 = 20.7

25. jim_thompson5910

do the same for the other diagonal multiply the diagonals, then divide by 2

26. mckenzieandjesus

so 6.9+13.8= 20.7 9.2+9.2= 18 2/5

27. mckenzieandjesus

my calc isnt letting me put in 2/5 after 18

28. mckenzieandjesus

ok its 380.88/2 = 190 11/25

29. mckenzieandjesus

so 190.44 m2 ?

30. mckenzieandjesus

@LegendarySadist so theres 4 sides to a square 4+4+4+4= 16 and 16/ 1/4= 64 did i do it right?

31. anonymous

Area of a square is $\large A=side^{2}$ and area of a circle is $\large A=\pi r^{2}$

32. mckenzieandjesus

so $4^{2} + 4^{2} + 4^{2} + 4^{2} = 64 ?$

33. anonymous

Where are the 4 squares that you're adding together? What? It's JUST $$4^{2}$$

34. anonymous

$\large 4^{2}=16$ Boom, now we have the area of the square.

35. mckenzieandjesus

$4^{2}= 16$

36. mckenzieandjesus

oops

37. mckenzieandjesus

$16\div \frac{ 1 }{ 4 } = 64$

38. anonymous

Now we find the area of the circle and multiply it by 4. Area of a circle is $$A=\pi r^{2}$$ so if we want that times 4 it would look like $\large A=4\pi r^{2}$ and HOW ARE YOU GETTING 64????

39. mckenzieandjesus

u said the diameter of a circle is 1/4th that? above^

40. mckenzieandjesus

sorry got confused.. what do i put for r?

41. mckenzieandjesus

so 4*3.14*5^2 = 314 could i do that or?

42. anonymous

So the diamater of two circles is the side length. So $\large 2d=side$ Since the radius is half of the diamater, it would be $\large 4r=side$ The side is 4, as we know, so it would be $\large 4r=4$ which makes $\large r=1$

43. mckenzieandjesus

so 4*3.14*1^2 = 12 14/25

44. anonymous

Yeah. Now to find the area of the unshaded region, just do $\large Area~of~square~~-~~Area~of~circles~=~Area~of~unshaded~region$

45. mckenzieandjesus

so 16-12 14/25= 86/25

46. mckenzieandjesus

so 25%? or?

47. anonymous

To find the chance of getting the unshaded region, so $\large \frac{Area~of~Unshaded~region}{Area~of~square}$

48. mckenzieandjesus

$\frac{ 86 }{ 25 } \div 16 = \frac{ 43 }{ 200 }$

49. mckenzieandjesus

thats not on my answers though..

50. anonymous

In percentage form, it's 21.5% tho

51. mckenzieandjesus

yeah in decimal form its 0.215 so i guess i got confused

52. mckenzieandjesus

should of converted the decimal to percentage oops

53. mckenzieandjesus

thank you!

54. anonymous

$\huge \color{aqua}N\color{fuchsia}o \space \color{lime}P \color{orange}r \color{blue}o \color{maroon}b \color{red}l \color{olive}e \color{purple}m \ddot\smile$