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Mathematics 12 Online
OpenStudy (mckenzieandjesus):

please help!(: Find the value of x. Ill draw the figure in the comments.

OpenStudy (mckenzieandjesus):

|dw:1433877355603:dw|

OpenStudy (mckenzieandjesus):

A. 3 B. 4 C. 6 D. 8

OpenStudy (sdfgsdfgs):

Er where is x in the diagram?

OpenStudy (mckenzieandjesus):

|dw:1433878260039:dw|

OpenStudy (mckenzieandjesus):

sorry i forgot that part

OpenStudy (mckenzieandjesus):

which of the following must be true? A.m<1>m2 B.m<1<m<2 C.m<1=m<2 D.m<1<m<2 |dw:1433878330495:dw|

OpenStudy (mckenzieandjesus):

@sdfgsdfgs

OpenStudy (sdfgsdfgs):

1st prob 1st - u may want to repost the second one separately.... triangle ABE and ACD are similar so their sides should be in the same ratio ok?

OpenStudy (mckenzieandjesus):

ok and ok

OpenStudy (mckenzieandjesus):

so how would I solve it?

OpenStudy (sdfgsdfgs):

What is the ratio of AB to AC?

OpenStudy (mckenzieandjesus):

60?

OpenStudy (sdfgsdfgs):

Not exactly - try this: what is length of AB and AC? Then divide AB/AC to find the ratio.

OpenStudy (mckenzieandjesus):

1?

OpenStudy (sdfgsdfgs):

What is length of AB?

OpenStudy (mckenzieandjesus):

30

OpenStudy (sdfgsdfgs):

How about AC? From point A to point C

OpenStudy (mckenzieandjesus):

60

OpenStudy (sdfgsdfgs):

So AB/AC=?

OpenStudy (mckenzieandjesus):

would the answer be b?

OpenStudy (mckenzieandjesus):

30/60= 1/2?

OpenStudy (sdfgsdfgs):

Nope, b is not the right ans sorry!

OpenStudy (sdfgsdfgs):

Correct - 1/2 is right now because the triangles are similar, BE/CD=AB/AC

OpenStudy (mckenzieandjesus):

so 1/2=1/2?

OpenStudy (sdfgsdfgs):

What are length of BE and CD?

OpenStudy (mckenzieandjesus):

60?

OpenStudy (mckenzieandjesus):

wait cd is 48

OpenStudy (sdfgsdfgs):

No, length between point B and E? Yes, CD is 48

OpenStudy (mckenzieandjesus):

im confused of how to figure that out..

OpenStudy (sdfgsdfgs):

Read your picture plz - the length is shown as what you are trying to solve here

OpenStudy (mckenzieandjesus):

3x

OpenStudy (sdfgsdfgs):

put in the values of BE and CD and ratio of AB/AC in: BE/CD = AB/AC What will you get?

OpenStudy (mckenzieandjesus):

9/16?

OpenStudy (mckenzieandjesus):

do i do 3/48 and 30/60?

OpenStudy (sdfgsdfgs):

YES, you just missed the x there, it should be 3x / 48 = 30 / 60 Solve for x and you get the ans.

OpenStudy (mckenzieandjesus):

30/60= 1/2 but how do i solve the other side?

OpenStudy (sdfgsdfgs):

3x / 48 =1/2 then multiply both sides by 48

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