Trigonometry question 9?

[Ematuro]

What did you guys all get for that? I got E but a lot of my friends said D. That was probably the most challenging question in the trig module D:

[spinaway]

i got e too 

[Ematuro]

Okay I just worked it out to be D.... I hope I'm wrong D:

[butene]

Hmm i got E as well

[arock]

I got D.

[Tashi]

You had to flip the triangle and then you get k=40/24. I kept tossing up between D and E because I didn't know but I'm pretty sure it's D.

[Ematuro]

Yeah pretty sure its D too. Similar triangles eh? So shattered..

[MicroShift]

Are you kidding me? They were similar triangles? Fuck, I spent 20 minutes on that question at the end trying to work it out and ended up with D by working back from the information given.
I really hope it was D.

[Bigkev93]

answers by itute:

Data Analysis
1C 2E 3C 4C 5E 6E 7A 8A 9B 10C 11D 12E 13D

Number Patterns
1C 2A 3D 4C 5D 6B 7E 8A 9D

gEOMETRY & tRIGONOMETRY
1D 2A 3C 4C 5D 6D 7B 8D 9D

Graphs & Relations
1B 2C 3A 4A 5B 6D 7E 8C 9E


apparently its D i did E though.

[Tashi]

Pretty sure I got 38/40 lol dammit.

[Bigkev93]

same here, if i got the last trig right,

[cammy]

has anyone got the matrices answers?

[cammy]

oh wait there is another thread. apologies

[Bigkev93]

The answer is definately E for question 9 in trig.
You have to add 100 to the answer you get with final answer you get with similar triangles.
I have cross checked with around 2 teachers.
And did it myself 2-3 times, so yeh.

[BubbleWrapMan]

ABD is similar to ACB, as they share theta and angle BAC.