Qualification > Math
IGCSE MATHS Doubts
Baladya:
--- Quote from: the golden girl on May 05, 2010, 04:02:56 pm ---By the way i have another question answer it for me ,plz!!
it's november 2000 paper 2 ...question 21) part a) .......i just wanna know y do i have to do this "180-54" .....i just don't get this part
can someone plz answer me :-\
as for contraentry ..thx alot for the help abt the other question .......just to let u kno i really want to help but i gtg cuz mystudy group r comin over .... srry :-[
--- End quote ---
Ya okay. Look in the question they said its OBTUSE. And the your answer will be 54. However 54 means it acute. So u have to 180-54. I dont know exactly why but as i said it has to do with being obtuse
Ghost Of Highbury:
--- Quote from: the golden girl on May 05, 2010, 04:02:56 pm ---By the way i have another question answer it for me ,plz!!
it's november 2000 paper 2 ...question 21) part a) .......i just wanna know y do i have to do this "180-54" .....i just don't get this part
can someone plz answer me :-\
as for contraentry ..thx alot for the help abt the other question .......just to let u kno i really want to help but i gtg cuz mystudy group r comin over .... srry :-[
--- End quote ---
Ok if u solve it using the sine method. You get 54 degree. However they say its obtuse which means sine x = 0.809 , x =/= 54.
in such situations, u have to use the trigonometric rule sine x = sine 180-x rule to find any other angle whose sine is 0.809
thus, 180-54 = 126. sine 126 = 0.809
Answer : 126 (Obtuse)
Baladya:
haha we all answered xD
I guess contraentry was faster :D
contraentry:
--- Quote from: Baladya on May 05, 2010, 04:34:26 pm ---haha we all answered xD
I guess contraentry was faster :D
--- End quote ---
'Cause I'm a ninja... :P :P
ksitna:
hey than k u adi +rep
kk how do i do this one
A company makes two models of television.
Model A has a rectangular screen that measures 44 cm by 32 cm.
Model B has a larger screen with these measurements increased in the ratio 5:4.
(a) Work out the measurements of the larger screen.
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