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Author Topic: ON 08 P4 HELP MATH!!  (Read 5396 times)

Offline astarmathsandphysics

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Re: ON 08 P4 HELP MATH!!
« Reply #30 on: May 17, 2009, 10:55:24 pm »
Quite tricky. Leave it til last and do the best you can.
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Offline theigstudent

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Re: ON 08 P4 HELP MATH!!
« Reply #31 on: May 17, 2009, 10:57:14 pm »
could some 1 explain Q7 a ii
how do u get y and z
same paper ???
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Offline astarmathsandphysics

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Re: ON 08 P4 HELP MATH!!
« Reply #32 on: May 17, 2009, 11:01:00 pm »
Rflection in line x=1? Is it Nov 08
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Offline theigstudent

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Re: ON 08 P4 HELP MATH!!
« Reply #33 on: May 17, 2009, 11:02:31 pm »
Quote from: astarmathsandphysics on May 17, 2009, 11:01:00 pm
Rflection in line x=1? Is it Nov 08
no its june o8
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Offline astarmathsandphysics

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Re: ON 08 P4 HELP MATH!!
« Reply #34 on: May 17, 2009, 11:05:24 pm »
OAB is isoceles since )A and OB are radii. therefore y=(180-130)/2=25

ST and Ob are parelell so by Z rule x=40
ABC and ADB sum to 180 so z=180-(25+40)=115
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Offline angell

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Re: ON 08 P4 HELP MATH!!
« Reply #35 on: May 17, 2009, 11:10:44 pm »
thank u so much for the prompt replies!!:D
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Offline theigstudent

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Re: ON 08 P4 HELP MATH!!
« Reply #36 on: May 17, 2009, 11:12:28 pm »
Quote from: astarmathsandphysics on May 17, 2009, 11:05:24 pm
OAB is isoceles since )A and OB are radii. therefore y=(180-130)/2=25

ST and Ob are parelell so by Z rule x=40
ABC and ADB sum to 180 so z=180-(25+40)=115

how to get y =25


n Thanks a lottttt for such instant replies

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Offline twilight

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Re: ON 08 P4 HELP MATH!!
« Reply #37 on: May 17, 2009, 11:18:28 pm »
like astar said .. AO and OB are equal bcoz they r radii .. so triangle AOB is isosceles ..
the sum of the angles is 180 .. so
angle OAB = angle OBA             and     OAB + OBA + 130 = 180    =>   OBA + OBA + 130 = 180

so 2y + 130 = 180            => y=25
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Offline theigstudent

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Re: ON 08 P4 HELP MATH!!
« Reply #38 on: May 17, 2009, 11:23:38 pm »
oh ya  it so simple
Thanks a lot ppl
i needa go because in next six hours i have to reach ma school 4 exam
best of luck to every1
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Offline archangel

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Re: ON 08 P4 HELP MATH!!
« Reply #39 on: May 18, 2009, 03:43:38 am »
ahh i need help, my exam is in 3 hours  :-\

do u guys know q7 part d)

why is the answer 57?
shouldnt it be 180-(78 x 2) = 24?

because if its isoceles than i can use that method right?
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Offline astarmathsandphysics

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Re: ON 08 P4 HELP MATH!!
« Reply #40 on: May 18, 2009, 07:42:52 am »
q7 doesnt have a d)
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Offline sanity_master

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Re: ON 08 P4 HELP MATH!!
« Reply #41 on: May 18, 2009, 07:44:40 am »
LOL :D.........every one is nervous

my xam is in 3 hours and 17 minutes !  :'(

God be with me....


good luck everyone :)
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