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Round o1, o2 intersect at A, B, circle over circle o1 o2 center.
(1) as shown in Figure I. A do over one diameter circle o ac, cb and extending the circle with o2 in d, with do1, confirmation, do1 perpendicular to the ac;
(2) Figure II through a circle made of a non-o1 diameter strings ac, cb and extending the circle with o2 at the point d, the do1 and ac still vertical it? Please justify your conclusion.
2010-11-06
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参考资料: 123465789
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