document.write( "Question 199566: Please help me with this proof:\r
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Algebra.Com's Answer #153072 by jsmallt9(3758)\"\" \"About 
You can put this solution on YOUR website!
Draw the circle with diameters AB and DC. Draw segments AC and BD.
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  1. Segments AB and DC are diameters of circle O. Reason : Given
  2. Segments AB and DC pass through the center O. Reason: Definition of diameters
  3. Segments OA, OB, OC and OD are all radii. Reason: Definition of radius
  4. Segments OA, OB, OC and OD are all equal in length. Reason: Definition of circle
  5. Segments OA is congruent to segment OD and segment OC is congruent to segment OB. Reason: Definition of congruent segments<.li>
  6. Angle AOC and angle DOB are vertical angles. Reason: definition of vertical angles.
  7. Angle AOC and angle DOB are congruent. Reason: Vertical angles are congruent
  8. Triangle AOC is congruent to triangle DOB. Reason SAS

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