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08 Aug 2003, 11:55
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Is ABCD a rectangle?
1) AC(imagine: diagonal of a quadrilateral) bisect BD (imagine: another diagonal of a quadrilateral) bisect each other in point E
2) Angle ABC = 90 degrees
1) AC(imagine: diagonal of a quadrilateral) bisect BD (imagine: another diagonal of a quadrilateral) bisect each other in point E
2) Angle ABC = 90 degrees
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09 Aug 2003, 05:47
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Konstantin Lynov
Is ABCD a rectangle?
1) AC(imagine: diagonal of a quadrilateral) bisect BD (imagine: another diagonal of a quadrilateral) bisect each other in point E
2) Angle ABC = 90 degrees
1) AC(imagine: diagonal of a quadrilateral) bisect BD (imagine: another diagonal of a quadrilateral) bisect each other in point E
2) Angle ABC = 90 degrees
My answer is E
(1) Tells us that the figure could be a rectangle or a square
(2) Tells us that, again, the figure could be a rectangle or a square
Combining, we still cannot be sure if its a rectangle or a square. Therefore, E
