Question

Cam someone explain, please?

Answer 1

What do you need to find?

Answer 2

Based on wht I know... it should be 55. But that's not one of the options

Answer 3

the measure of the numbered angle

Answer 4

Is it a central angle?

Answer 5

Yes

Answer 6

Are the two arcs' measures 60?

Answer 7

No, one is 60 and other's 50

Answer 8

So the lines aren't diameters?

Answer 9

no

Answer 10

Okay. What are your options?

Answer 11

And if they aren't diameters, then how is angle 6 a central angle?

Answer 12

a. 115
b. 125
c. 120
d. 130

Answer 13

How is angle 6 a central angle, then?

Answer 14

It's not. I was just being silly

Answer 15

Okay...well, I'm not sure then. Haven't done geometry in a while. Maybe someone like @eliassaab can help?

Answer 16

oh, do you think you could help me with another?

Answer 17

@thechocoluver445

Answer 18

i'll try :)

Answer 19

one second :)

Answer 20

http://assets.openstudy.com/updates/attachments/4fda4775e4b0f2662fd0d051-bagelsareicelandic-1339705224410-desert.jpg

Answer 21

AE, right?

Answer 22

I'm not sure. Let's see if the amazing campbell_st can confirm

Answer 23

http://www.sparknotes.com/math/geometry2/theorems/section5.rhtml Theorem 2

Answer 24

the new question uses the property

the square of the length of a tangent from an external point is equal to the product of the intercepts of the secant

AC is a secant

AI is a tangent

then AF*AC = AI ^2

and AD is a secant from the same point

so

AE*AD = AI^2

then

AF*AC=AD*AE

the missing infromation is AE

Answer 25

Campbell, can you perhaps scroll up and explain the first problem? we never figured it out

Answer 26

And @thechocoluver445 I have one more problem for you. Then, I'm done. :)

Answer 27

Ok:)

Answer 28

I've looked at it... the diagram made it a bit difficult