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January 17, 2026, 04:58:00 am
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Author Topic: Q4. Flying Fox - Geometry.  (Read 8049 times)  Share 

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pirocan1

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Q4. Flying Fox - Geometry.
« on: November 03, 2010, 04:30:46 pm »
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Is it 8.55 or 6.54??

I got different answers for the different lengths i used...

What a stupid question, it didnt even tell you to how many decimal places.
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Predator

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Re: Q4. Flying Fox - Geometry.
« Reply #1 on: November 03, 2010, 04:32:07 pm »
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Some have also said 7.55.
I believe it is 7.55 finding the ratio then multiplying it by the height and then adding either 4 or 3 ( dont remember ), all I know is that I only got 1/2 since I didnt add the height >.<
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Spick

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Re: Q4. Flying Fox - Geometry.
« Reply #2 on: November 03, 2010, 04:32:19 pm »
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I got the scale factor of 1.46 and used that to get 6. something.. but ive been reading around and everyone got different answers so im probably wrong haha
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Spick

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Re: Q4. Flying Fox - Geometry.
« Reply #3 on: November 03, 2010, 04:32:47 pm »
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Yea everyone keeps saying, 7.55 so im thinking thats it...
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sam.utute

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Re: Q4. Flying Fox - Geometry.
« Reply #4 on: November 03, 2010, 04:34:09 pm »
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I believe it is 7.75, as solved by my calculator.

If you calculate the area of the whole trapezium, it is 1360. Then:
1360 = Area of left trapezium + Area of right trapezium
Solve for x, and you get 7.75.
Easy!
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superstar1

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Re: Q4. Flying Fox - Geometry.
« Reply #5 on: November 03, 2010, 04:34:38 pm »
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the easiest way was to use trigonometric ratios. Because the angle between the smaller and larger triangle is the same. Then finding the angle u use it to find the height of smaller triangle which is in turn 3.25 , add that to 4.5 and u get 7.75. sweet. i was so happy with that question.
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alex_1215

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Re: Q4. Flying Fox - Geometry.
« Reply #6 on: November 03, 2010, 04:34:52 pm »
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i got 7.75 or 7.55 cant remember. It was 7 something
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pirocan1

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Re: Q4. Flying Fox - Geometry.
« Reply #7 on: November 03, 2010, 04:37:45 pm »
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i did..

12.5:95
x:65

hence, x=(12.5*65)/95= 8.55

how did people get 7.55..?
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superstar1

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Re: Q4. Flying Fox - Geometry.
« Reply #8 on: November 03, 2010, 04:39:25 pm »
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theres the thing its nopt 12.5 to 95. because thats not a triangle. its 12.5: 160
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menashiiii

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Re: Q4. Flying Fox - Geometry.
« Reply #9 on: November 03, 2010, 04:44:15 pm »
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7.75!!
definitely!
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BSKT

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Re: Q4. Flying Fox - Geometry.
« Reply #10 on: November 03, 2010, 04:46:05 pm »
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12.5:160 isn't a triangle either
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travy92

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Re: Q4. Flying Fox - Geometry.
« Reply #11 on: November 03, 2010, 04:46:34 pm »
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I had no idea how to do it.
So I used a different method.

I found the gradient of the slope and subbed in the value of H.
Wrong section I know but still got the answer: 7.75
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Studyinghard

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Re: Q4. Flying Fox - Geometry.
« Reply #12 on: November 03, 2010, 04:47:08 pm »
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it was 8: 160
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Studyinghard

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Re: Q4. Flying Fox - Geometry.
« Reply #13 on: November 03, 2010, 04:47:53 pm »
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8/160 = x/65
x = 3.25
3.25 + 4.5 = 7.75
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onerealsmartass

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Re: Q4. Flying Fox - Geometry.
« Reply #14 on: November 03, 2010, 04:48:01 pm »
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Quote from: superstar1 on November 03, 2010, 04:34:38 pm
the easiest way was to use trigonometric ratios. Because the angle between the smaller and larger triangle is the same. Then finding the angle u use it to find the height of smaller triangle which is in turn 3.25 , add that to 4.5 and u get 7.75. sweet. i was so happy with that question.
thats what i did :)
took me like bloody 10 minutes... was staring at that bloody question for like yonks..
teacher reckons it was a good method :D
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