P is a point outside the circle O, pa and PB are tangents of the circle O, A and B are tangents, and AB intersects with OP at C. It is proved that CP⊥AB, AC=BC 5 [label: PA, pb tangents] P is a point outside the circle O, PA and PB are tangents of the circle O, and A and B are tangents. AC=BC anonymous answer: 1 popularity: 1 12 solution time: 2010-1122:1/. △OPA?△OPB = & gt； ∠APC=∠BPC∠APC=∠BPC, AP = BP = & gt△APB is an isosceles triangle, and the bisector of the vertex of the isosceles triangle is the middle line of the vertical line and the bottom line = & gtAB⊥CP,AC=BC. You have already evaluated the answer! Good: 5 You have already evaluated it! General: 333->; You've already commented! Bad: 0 You have already evaluated it! Original: 5 You have already evaluated it! Non-original: 0 Ling Fei's answer adoption rate: 26.7% 2010-1-0122: 06 Questioner's testimony: 3Q, I have a better answer collection to upload to QQ space-> Related knowledge? As shown in the figure, PA and Pb are tangents of circle O, A and B are tangents, AB and OP intersect at point C, OC= 1cm, CP=… 1 Answer 2010-27? Pa and Pb are tangents to the circle O, and the tangents are A and B. If the diameter AC= 12cm and the angle P = 60, find the length of AB 1 and answer 2011? Draw two tangents PA and Pb of the circle O from a point outside the circle O, and the tangents are A and B. If PA = 8 and C is a fixed point on the arc AB, …2 Answer 2010-1? Dad. PB is the tangent of circle O, A and B are the tangent points, OP intersects with AB at point D, and intersects with circle O at point C. AD=2 times the root number three, … 1 Answer 2008- 12-28? As shown in the figure, AC is the diameter of circle O, PA and Pb are tangents of circle O, A and B are tangents, AB=6, PA=5. Search: (… 1 Answering 20 10-05-08 Learn more about it > & gt-& gt；; I want to comment and browse all comments >> Online Help Team: First Type: Intermediate Group Satisfaction Answer: 48 192 Team Manifesto: Everything has changed from the beginning. ? Solve two problems in the first volume of the eighth grade? 4+ 14= self-deception, having fun: 18 Adoption rate: 42.4%? Three baskets of apples are lighter than four baskets of pears 12.5 kg. As we all know ...? How much is 2.5 million Jin of rice? -& gt； -& gt； -& gt； Help make suggestions. Copyright? 1998–2010 Tencent. All rights reserved. Close the input of the knowledge you are interested in above, and click the search answer, and a list of questions you are interested in will appear below. Enter any questions you are interested in, and click one of the four evaluation buttons at the satisfactory answer to complete the evaluation of the satisfactory answer.