Question

If BG = 90 and AF = 35, find the length of DE

Answer 1

Diagram Please

Answer 2

i just posted it. refresh if you can't see it

Answer 3

we got crossing chords

ab = cd if i remember it right

Answer 4

A)56.56
B)57.01
C)28.28
D)165.84

Answer 5

there is no CD on the diagram

Answer 6

of course there isnt ...

Answer 7

crossing chords have the property that the ends multiply out the same

Answer 8

BG passing through Centre ?

Answer 9

is that what C stands for? the center?

Answer 10

i'm confused.

Answer 11

Sorry. :/

Answer 12

this is why the study part helps, as opposed to the pick an answer part :/

Answer 13

do you recognize the crossing chords from your material?

Answer 14

I know that, I want help. I don't want anyone to give me the straight answer.

Answer 15

he means that DF x FE = GF x BF

Answer 16

And I have been really behind and my instructor told me to just go ahead with the assignments even though I missed the lessons. (Which soudned ridiculous, to me.)

Answer 17

So, no, I don't recognize the crossing chords thing.

Answer 18

it would help if you did, its rather elemental to the question :)

Answer 19

LOL !! Can't you see in the diagram ??
Do you know what is chord ?

Answer 20

@amistre64 Most likely. I'll go look now.
@vikrantg4 What do you mean?

Answer 21

Can't you see in the diagram that 2 chords are intersecting each other ?

Answer 22

http://www.cemc.uwaterloo.ca/contests/euclid_eWorkshop/eew_ps6.pdf

this might help some

Answer 23

@vikrantg4 I see that, obviously. I thought that what amistre64 was saying is that there is an entire definition of the property (if it is so.) Math, especially geometry, is not my strong part so please be respectful of that.

Answer 24

im not familiar with the geometry either, its been to many years since I had to go thru it.

this might be useful as well:

http://www.cliffsnotes.com/study_guide/Segments-of-Chords-Secants-Tangents.topicArticleId-18851,articleId-18828.html

Answer 25

Oh, I just found the thing on crossed chords in the first link you sent me. I couldn't find it in my lessons.

Answer 26

the information given, we can calculate the missing measures

Answer 27

"A" appears to be the center of the circle ...

Answer 28

yes

Answer 29

and AF is 35, which is already given. But how would we find the length of DE?

Answer 30

bg = 90

ba = 45; af = 35; fg = 45-35
=10
bf = 45+35
= 80

df = ef

de = df+ef

this is what i consider

Answer 31

80*10 = df*fe

800 = 2x

x = 400

df=400, fe = 400

de = 400 ... maybe

Answer 32

DE can't equal 400, I have a choice of 4 different answers and 400 isn't one of them

Answer 33

yeah, i just reviewed them :)

Answer 34

I completely understand the first part now. That part isn't that difficult it seems. But to find DE.... hmmm let me go back and see what it says in my lessons. I doubt anything ill be there.

Answer 35

*will

Answer 36

90
|--------------|
B.....a.....F...........G
| 35|
|-45|----45------|
|45+35 | 45-35 |
80 10

looks right to me from there

Answer 37

Yeah to me too.

Answer 38

ugh... I hate geometry.