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Would this formula be allowed for FP1?

This formula finds the area of a triangle, I could use it for Matrix triangle questions or Coordinate systems. : 12(xaxc)(ybya)(xaxb)(ycya) \frac{1}{2}|(x_a - x_c)(y_b - y_a)-(x_a - x_b)(y_c - y_a)|

Would I lose method marks?

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I know precisely who you are and yet I'm still going to help:

Yes, you're allowed to use that, it is a special case of a more general one (shoelace) and is commonly used.
Original post by Zacken
I know precisely who you are and yet I'm still going to help:

Yes, you're allowed to use that, it is a special case of a more general one (shoelace) and is commonly used.


? :redface:
Reply 6
Original post by Zacken
I know precisely who you are and yet I'm still going to help:

Yes, you're allowed to use that, it is a special case of a more general one (shoelace) and is commonly used.


Thanks dude, I knew there was some good in you.

But, are you sure? Especially using this for Matrices would defy the clear root that they intend for you to take.
Reply 7
Original post by DylanJ43
Thanks dude, I knew there was some good in you.

But, are you sure? Especially using this for Matrices would defy the clear root that they intend for you to take.


You certainly can, an examiner who uses this site has been asked this a few times - I'll link you to her post about it once I'm on my computer and can search it up.
Reply 8
Original post by Zacken
You certainly can, an examiner who uses this site has been asked this a few times - I'll link you to her post about it once I'm on my computer and can search it up.


Thanks you beauty
Reply 9
Original post by Student403
? :redface:


Your friendly neighbourhood super hero Duck
Reply 10
Original post by Zacken
You certainly can, an examiner who uses this site has been asked this a few times - I'll link you to her post about it once I'm on my computer and can search it up.


Are you on your computer yet
Reply 11
Original post by DylanJ43
Are you on your computer yet


No, I'm not home. I used this formula in my FP1 exam this year btw.
Reply 12
Original post by Zacken
No, I'm not home. I used this formula in my FP1 exam this year btw.


Yeah, but you got 91 ums...

Do you know what lost you marks?
Reply 13
Original post by DylanJ43
Yeah, but you got 91 ums...

Do you know what lost you marks?


Yeah, I copied the wrong thing when moving from one page to the other. Lost 4 marks which got me 91 UMS.
Reply 14
Original post by Zacken
Yeah, I copied the wrong thing when moving from one page to the other. Lost 4 marks which got me 91 UMS.


That's a fear, I always have when doing past papers :/

Did you use the formula for question 8b?
Reply 15
Original post by DylanJ43
That's a fear, I always have when doing past papers :/

Did you use the formula for question 8b?


Meh, I can't really be arsed. I finished early and couldn't be bothered checking. My UMS in FP1 is pretty much irrelevant.

I did, yes.
Reply 16
Original post by Zacken
Meh, I can't really be arsed. I finished early and couldn't be bothered checking. My UMS in FP1 is pretty much irrelevant.

I did, yes.


Did you use the coordinates of OBC directly? I'm getting 1/2 ar
Reply 17
Original post by Zacken
Meh, I can't really be arsed. I finished early and couldn't be bothered checking. My UMS in FP1 is pretty much irrelevant.

I did, yes.


zainy
Reply 18
Original post by DylanJ43
Are you on your computer yet


Here you go. Tiny hobbit is an examiner, so that's sorted.
Reply 19
Original post by Zacken
Here you go. Tiny hobbit is an examiner, so that's sorted.


Thanks, but as for formula why am I getting 1/2 ar

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