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Master | Next Rank: 500 Posts
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by Mayur Sand » Tue Jul 21, 2009 8:01 pm
The points R, T, and U lie on a circle that has radius 4. If the length of arc RTU is , what is the length of line segment RU?

A. 4/3
B. 8/3
C. 3
D. 4
E. 6
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by tohellandback » Tue Jul 21, 2009 9:41 pm
you have missed the length of the arc. Plz repost
The powers of two are bloody impolite!!
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by sreak1089 » Wed Jul 22, 2009 4:41 am
I know length of the arc is missing here. Assuming the length of the arc to be (l), I will try to solve the problem as below:

1) I find the length of the minor arc:

From the lenght of the arc, I can find out whether its a minor arc or major arc. If what is given is major arc, then length of the minor arc == (length of the circumference - length of the major arc)

2) (Lenght of the minor arc / length of the semi-circle) = (length of the chord) / (diameter)

=> length of the chord = (diameter * length of the minor arc) / (length of the semicircle)

i.e., l = (2r *l) / (pie * r)

Is the above approach correct to solve this problem?
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by Mayur Sand » Wed Jul 22, 2009 7:07 am
iam sorry but when i was solving this question this is what i got in statement . It will great if some one can complete it
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by sreak1089 » Wed Jul 22, 2009 7:07 am
Guys, is my approach right for the problem below?
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by PussInBoots » Sat Jul 25, 2009 5:36 pm
No, your approach is wrong. Draw few examples and you'll see
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by prindaroy » Sat Jul 25, 2009 7:02 pm
length = 8cos (45x/pi)
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