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Geometry question

Expert replies
Source: — Problem Solving |

by mendiratta » Tue May 08, 2007 8:55 pm
whwre's the problem figure?
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by mendiratta » Tue May 08, 2007 9:00 pm
I think it is sqrt(3)/2.
Angle subtended by diameter is always 90 degree.
So it is right angled triangle with 2 sides as 1 & 2(twice the radius).
There the third side is sqrt(3). ( 1,2,sqrt(3) ) kind of triangle.
therefore
area = (base*height)/2
area = ( sqrt(3) * 1 )/2
area = sqrt(3)/2.
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by Cybermusings » Sat May 12, 2007 2:41 am
Remember the theorem for your exam...An angle in a semicircle is a right-angle...

Here angle ABC is a right angle...

AC = Diameter = 2
BC = 1
So AB = sqr rt. 3
Now Area = 1/2 * sqr rt 3 * 1 = sqr rt. 3/ 2

Hence Choice C
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