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Finding the perimeter help? please :-)

ABCD IS A QUADRILATERAL.AB=7CM AND BC=9CM. Angle ABC=75 DEGREES AND ANGLe ADC = 90 DEGREES.
Calculate the perimeter of ABCD.
i dont know how to answer this question?
Original post by Chelsea12345
ABCD IS A QUADRILATERAL.AB=7CM AND BC=9CM. Angle ABC=75 DEGREES AND ANGLe ADC = 90 DEGREES.
Calculate the perimeter of ABCD.
i dont know how to answer this question?


i feel like the answer is pretty easy
but i think i am being completely dumb here
it's quadrilateral so if you have been giving the sides of AB and BC then the opposite of these sides are going to be the same and then all of the them together BUT the sides bit is throwing me out
i can do that as well but i dunno if it's going to be right or not
is it GCSE question and what it is out of?
Original post by fatima1998
i feel like the answer is pretty easy
but i think i am being completely dumb here
it's quadrilateral so if you have been giving the sides of AB and BC then the opposite of these sides are going to be the same and then all of the them together BUT the sides bit is throwing me out
i can do that as well but i dunno if it's going to be right or not
is it GCSE question and what it is out of?


it's a gcse question and its out of 5 marks. the sides of the quadrilateral are not the same in the drawing. each one looks like a different length?
Original post by Chelsea12345
it's a gcse question and its out of 5 marks. the sides of the quadrilateral are not the same in the drawing. each one looks like a different length?


ohh okay now i know!
i'll get back to you soon :h:
Original post by Chelsea12345
ABCD IS A QUADRILATERAL.AB=7CM AND BC=9CM. Angle ABC=75 DEGREES AND ANGLe ADC = 90 DEGREES.
Calculate the perimeter of ABCD.
i dont know how to answer this question?


Did you forget to mention AD = 6 cm?
Vital information, you know...
Reply 5
Avatar for S.KANWAL
S.KANWAL
Can u post the picture of the quadrilateral up
Original post by EricPiphany
Did you forget to mention AD = 6 cm?
Vital information, you know...

yep i did. thankyou for remiding me and i'm assuming you know the answer to the question if you know what the question is, so ??
Original post by Chelsea12345
ABCD IS A QUADRILATERAL.AB=7CM AND BC=9CM. Angle ABC=75 DEGREES AND ANGLe ADC = 90 DEGREES.
Calculate the perimeter of ABCD.
i dont know how to answer this question?


Can you post a picture of the question?
because your question doesn't look right to me
Original post by Chelsea12345
yep i did. thankyou for remiding me and i'm assuming you know the answer to the question if you know what the question is, so ??


Find AC squared using the cosine rule, and then use Pythagoras to find CD. l haven't done it myself though.
(edited 8 years ago)
Original post by ericpiphany
find ac squared using the cosine rule, and then use pythagoras to find cd. L haven't done it myself though.


thankyou!!!!!!!!!!! :smile:
in which pastpaper this question is in, i can look at the question from there!
Original post by fatima1998
in which pastpaper this question is in, i can look at the question from there!

Hi, i got the answer . thankyou for trying to help me and i genuinely dont know which past paper this question is from since i got this sheet from maths teacher, who took lots of trig past paper question then put them on one sheet.:smile:
Original post by fatima1998
in which pastpaper this question is in, i can look at the question from there!


MATHEMATICS (MODULAR) (SPECIFICATION B) 33005/H2 2004
Question 15
Original post by Kvothe the arcane


Thanks :h:

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