math pretty easy but im dumb

[steady fern]

triangle abc is the same as triangle ebf but ebf is smaller

im a little confused as to what ef is

fixed it so u can se

[short otter]

so because of the angles are same

the ratio between edges must be same too

[steady fern]

ye

they are the same triangles one is just abit tinier

[short otter]

CA/AB must be equal to FE/EB

[steady fern]

i mean anglewise and that yes but not in length

[short otter]

5/15 = EF/12

[steady fern]

https://tenor.com/view/cat-huh-cat-huh-etr-gif-15332443943609734737

[short otter]

lol

they are angelwise triangles

so

the ratio between the edges must be same

[steady fern]

a ok

[short otter]

you got it ?

[steady fern]

fuck no but ill try

ty

i got some of it

wait

i forgot to type the question

what is ef

mb its 1 am

im tired

[short otter]

think from this image

GB/AB = FC/AC = ED/AD

because angels are same

[steady fern]

ye

[short otter]

you understood that ?

[steady fern]

ye

[short otter]

now apply this for question

CA/AB = FE/EB

[steady fern]

yo

im getting there

yess

i did it

fe is 4.75

wait

its not

wtf

its 4

ef is 4

les go

[short otter]

https://tenor.com/view/clapping-leonardo-dicaprio-leo-dicaprio-gif-10584134

my boi

[steady fern]

ty for the help

[short otter]

you are welcome

[final mist]

just to restate what you realized for the sake of nailing it in, a property of similar triangles is that the ratios between each triangle's side lengths are the same