O’ are collinear.

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10. In Fig. 9.19, the common tangent, AB and CD to two circles with centres O and O’ intersect at E. Prove that the points O, E, O’ are collinear.
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10. In Fig. 9.19, the common tangent, AB and CD to two circles with centres O and O’ intersect at E. Prove that the points O, E, O’ are collinear. -e 10. In Fig. 9.19 AB and CD to two circles with centres O and O' intersect at E. Prove that the points O O' [...]
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