ATAR Notes: Forum
Archived Discussion => Mathematics => 2011 => End-of-year exams => Exam Discussion => Victoria => Further Mathematics => Topic started by: Ematuro on November 04, 2011, 01:54:56 pm
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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:
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i got e too :-\
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Okay I just worked it out to be D.... I hope I'm wrong D:
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Hmm i got E as well
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I got D.
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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.
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Yeah pretty sure its D too. Similar triangles eh? So shattered..
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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.
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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.
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Pretty sure I got 38/40 lol dammit.
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same here, if i got the last trig right,
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has anyone got the matrices answers?
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oh wait there is another thread. apologies
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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.
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ABD is similar to ACB, as they share theta and angle BAC.
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I got D because I thought that VCAA might try to trick the students who got 178 and forgot to add 100 at the end so I guessed that 278 was the correct answer but then I realized if it was similar triangles it wouldn't make much sense. I think there was no logic at the reason behind my chosen answer (and this post isn't making much sense), but yes, I chose D.
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I got D because I thought that VCAA might try to trick the students who got 178 and forgot to add 100 at the end so I guessed that 278 was the correct answer but then I realized if it was similar triangles it wouldn't make much sense. I think there was no logic at the reason behind my chosen answer (and this post isn't making much sense), but yes, I chose D.
LOL. Exactly what I thought but I added the 100 to 278 and got E.
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I chose A.
And I seem to be the only person in the state to do so.
FML.
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D is the correct answer. because ABD is similar to ABC. That means if you worked out the triangle ABC to be 378 then the triangle CBD must have been 278 which cannot be determined.
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D is the correct answer. because ABD is similar to ABC. That means if you worked out the triangle ABC to be 378 then the triangle CBD must have been 278 which cannot be determined.
ACB is similar to ABD rather
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this question is just fked up :S it doesnt make sense, meh.
I hope exam 2 is better.
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For Geo and trig Q8. what did people put ? My friend told me it was C) (apparently)
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I'm actually surprised I got this one right. The working out was relatively simple for a Q9 in a module...nevertheless I still only scored 5/9 for trig :(
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9 for trig - is D - we got it checked by a spec teacher
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I think the answer to Question 9 is D, (my working is shown in the attached document, using similar triangles and Heron's formula).
In general, if two triangles are similar, the ratio of their side lengths is the square root of the ratio of their areas.
Hence, since the sides of Triangle ABC are 5/3 of the sides of Triangle ABD, it follows that the area of Triangle ABC is 25/9 of the area of Triangle ABD, and hence, the area of Triangle ABC is
100(25/9) = 277.777, closest to answer D.