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03 May 2008, 06:05
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I doubt the correctness of this question, can anyone shed some light on correctness of question.
We know the redius, so we can find out the area without any option 1 and 2.
Can somebody tell me any rectangle when diagonally split forms two 30-60-90 triangles or it can be different kind of right angle triangle, (eg 20-70-90)?
In fact after knowing statement 1 it gets me length = w * sqrt(3), that is same in 30-60-90 triangle
Thanks
We know the redius, so we can find out the area without any option 1 and 2.
Can somebody tell me any rectangle when diagonally split forms two 30-60-90 triangles or it can be different kind of right angle triangle, (eg 20-70-90)?
In fact after knowing statement 1 it gets me length = w * sqrt(3), that is same in 30-60-90 triangle
Thanks
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03 May 2008, 06:13
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Isn't the question asking for the area of the shaded region which means that you need to know the areas of the circle and the rectangle? We can calculate the area of the circle from the radius and the area of the circle using statement 1.
29 May 2008, 03:47
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We can only know the area of the shaded region if we know both areas of the circle and the rectangle.
S1 is sufficient to find the length of the other side of the rectangle and thus find its area. If we know the length of the diameter (which equals the diagonal of the rectangle), we also know the radius and the side of the rectangle. We can find the length of another side using the Pythagorean theorem. The area of the shaded region equals the circle area - rectangle area.
S2 is insufficient, it tells only about which side is longer. We still need to find the lengths of the sides.
What you guys think? Is A the OA?
S1 is sufficient to find the length of the other side of the rectangle and thus find its area. If we know the length of the diameter (which equals the diagonal of the rectangle), we also know the radius and the side of the rectangle. We can find the length of another side using the Pythagorean theorem. The area of the shaded region equals the circle area - rectangle area.
S2 is insufficient, it tells only about which side is longer. We still need to find the lengths of the sides.
What you guys think? Is A the OA?
