Question

Someone please explain to me how to work the problem in the attachment ?

Answer 1

there is no attachment, linda :)

Answer 2

so what's your problem?

Answer 3

sorry, didn't read the topic carefully ...

Answer 4

First hint: you can draq a circle with the center A that intersects C,D,E

Answer 5

*draw

Answer 6

and then do i just add them ?

Answer 7

add what?

Answer 8

fe and ag

Answer 9

i think thats correct

Answer 10

it only might be that the image has a bad solution, which seems to be the case because there is no 20

Answer 11

so i was wrong with my circle

Answer 12

yes, that is what i was confused about because my answer was 20 . .

Answer 13

but we can use trigonometry to get af

Answer 14

so we would have AF

Answer 15

do you know how to do trigonometry?

Answer 16

i meant AE, sorry for that

Answer 17

no not really . . .

Answer 18

Final try:
You can use pythagorean theorem to get AF
Then add AF and FE
AE is the same like AC

Answer 19

sorry i mixed the known parameters up
Do you now know how to do that?? And espacially do you know why to do it so??

Answer 20

okay so we get a soltion that is on the list! :DD

Answer 21

yes i know how to do pythagorean theorem, but no i dont know why . .

Answer 22

alright do you see that the triangle AGF has a an angle of 90° ?

Answer 23

due to the bad resolution of the picture it's not really easiy

Answer 24

19

Answer 25

cool man that you're just posting the solution. Great job, man

Answer 26

._.

Answer 27

angle AFG= 90
so AF=4
beacuse AC=AE
so AC=AE=AF+FE=19

Answer 28

okay thanks for the answer but i cearly said that i neede someone to EXPLAIN it to me ! not give me the answer ! i was working it out ! i wont learn anythin if you just give the answer !

Answer 29

so we gonna continue?ß

Answer 30

please ? !

Answer 31

ok

Answer 32

you either can see that there is an angle 0f 90° at the angle AFG or you can know that because of the definition of tangent.

Answer 33

which are in this case clearly secants

Answer 34

`okay ! i never understood what a secant was . . .

Answer 35

A definition of a secant says that it meets the circle only in one point.
The radius between this point and the middle of the circle (this case FG) is also in an angle of 90° to the secant.

Answer 36

oh okay gottcha !

Answer 37

So you know that there must be an angle of 90° at AFG...

Answer 38

Great

Answer 39

yes okay now i im not so confused anymore with that

Answer 40

more explanation??

Answer 41

yes, please , how do i find the length of AC ?

Answer 42

okay, do you see that there is a line through A, G, D ?

Answer 43

yes

Answer 44

line through AGD is a mirror axis

Answer 45

do you get that?

Answer 46

yes got it !

Answer 47

And in normal symmetry all length keep the same

Answer 48

perfect

Answer 49

okat i understand that

Answer 50

*okay