Mathematics
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OpenStudy (knightrider):
how to find angle b/w two vertex in a circle????
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OpenStudy (anonymous):
u have picture?
OpenStudy (knightrider):
wait
OpenStudy (anonymous):
what do u mean by vertex in a circle?
OpenStudy (anonymous):
yeah..a picture might help
OpenStudy (anonymous):
?
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OpenStudy (knightrider):
i'm trying to find a picture pls w8 for couple of more mis
OpenStudy (anonymous):
I be back, the angles depen
OpenStudy (knightrider):
here is the pic
OpenStudy (knightrider):
angle b/w A and B
OpenStudy (anonymous):
what w?
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OpenStudy (anonymous):
between A and B?
OpenStudy (knightrider):
yeah
OpenStudy (anonymous):
A and B are the points on a circle, u can find the central angle of the arecAB
OpenStudy (anonymous):
arc AB*
OpenStudy (anonymous):
just 90 degrees lol
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OpenStudy (anonymous):
why make it complicated
OpenStudy (anonymous):
well, the figure is drawn roughly, may not b perpendicular
OpenStudy (knightrider):
how to find the central angle
OpenStudy (anonymous):
>>
OpenStudy (anonymous):
u need more info, the radius and the length of arc
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OpenStudy (anonymous):
\[r=l \theta\]
OpenStudy (anonymous):
\[l=r \theta\]
OpenStudy (anonymous):
arc length=radius * central angle
OpenStudy (anonymous):
A B is 90 degree then the central angle is the same
OpenStudy (anonymous):
yeh, thats prob it , im not paying much attention tonight
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OpenStudy (anonymous):
the angle on the circle is 1/2 angles in center
OpenStudy (knightrider):
radius is 50 mm and length is 78.5 mm but i'm getting 1.57 deg
OpenStudy (anonymous):
the answer you get is in radians
OpenStudy (anonymous):
78.5/50
OpenStudy (anonymous):
if you are using l =r theta
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OpenStudy (anonymous):
pi radians = 180 degrees , therefore 1 radian = 180 / pi degrees
OpenStudy (anonymous):
which works out as 90degrees exactly
OpenStudy (anonymous):
so I was right from the start :P
OpenStudy (anonymous):
how come?
OpenStudy (anonymous):
what do u mean how come, I was right
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OpenStudy (anonymous):
right if the lines are perpendicular,
OpenStudy (anonymous):
well, it turns out they are :P
OpenStudy (anonymous):
yes, the seem to be :)
OpenStudy (anonymous):
but actually the qs is to find the angle b/w A n B
OpenStudy (anonymous):
your point?
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OpenStudy (anonymous):
angle is 90 , done
OpenStudy (anonymous):
angle is 90 , done
OpenStudy (anonymous):
conditiionally done ;)