circle question with two secants(chords) and one tangent

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ifthyder: Master | Next Rank: 500 Posts; Posts: 118; Joined: Fri Apr 18, 2008 4:58 am; Thanked: 1 times

by ifthyder » Wed Nov 05, 2008 3:53 am

explaination?

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Source: Beat The GMAT — Problem Solving | Wed Nov 05, 2008 3:53 am

raunekk: Legendary Member; Posts: 1159; Joined: Wed Apr 16, 2008 10:35 pm; Thanked: 56 times

by raunekk » Wed Nov 05, 2008 4:26 am

gawd!!!

i dont know how to initiate in tis...

anyone??

sudhir, reachac???

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jimmiejaz: Master | Next Rank: 500 Posts; Posts: 207; Joined: Sun Mar 11, 2007 6:16 pm; Location: Mumbai; Thanked: 11 times

by jimmiejaz » Wed Nov 05, 2008 5:26 am

raunekk wrote:gawd!!!

i dont know how to initiate in tis...

anyone??

sudhir, reachac???

the ans for 1st ques is (75+36)/2 = 55.5
the ans for 2nd ques is (114+36)/2 = 75.

hope it helps

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Fab: Senior | Next Rank: 100 Posts; Posts: 87; Joined: Tue Jul 15, 2008 10:23 amFollowed by: 1 member; Location: Lima; Thanked: 4 times

by Fab » Wed Nov 05, 2008 8:27 am

B is clear.
What's the theory for A?

THANKS.

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jimmiejaz: Master | Next Rank: 500 Posts; Posts: 207; Joined: Sun Mar 11, 2007 6:16 pm; Location: Mumbai; Thanked: 11 times

by jimmiejaz » Wed Nov 05, 2008 8:35 am

Fab wrote:B is clear.
What's the theory for A?

THANKS.

Hi all,

will suggest all of you to go through this link.
https://regentsprep.org/Regents/mathb/5A ... Angles.htm
It is really helpful.
After reading you will get the answer, but since u asked, the angle drawn by then tangent with the chord as given in the original circle is half the angle of the intercepted arc. Here AC is the minor arc. So, angle made by the tangent is (75+36)/2.
If you guys can pls post the OA, it will be really helpful for all of us.

Hope it helps everyone..
Keep rocking guys!!!!!
4days to go to GMAT again!!!!!

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Fab: Senior | Next Rank: 100 Posts; Posts: 87; Joined: Tue Jul 15, 2008 10:23 amFollowed by: 1 member; Location: Lima; Thanked: 4 times

by Fab » Wed Nov 05, 2008 9:12 am

Thanks, good luck!

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raunekk: Legendary Member; Posts: 1159; Joined: Wed Apr 16, 2008 10:35 pm; Thanked: 56 times

by raunekk » Wed Nov 05, 2008 9:14 am

@jimmiejaz

thanks a lot...

all d best...

go for it...

YES YOU CAN!!

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jimmiejaz: Master | Next Rank: 500 Posts; Posts: 207; Joined: Sun Mar 11, 2007 6:16 pm; Location: Mumbai; Thanked: 11 times

by jimmiejaz » Wed Nov 05, 2008 4:46 pm

thanks a lot for encouragin guys
i really need it....

keep rocking!!!!!!!

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