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State the conditions of congruency in each of the following figures:

Dear student
(a) Consider △DAC and △BACAC=ACcommonAD=AB given∠DAC=∠BACgivenSo,  △DAC ≅ △BAC by SAS criteria
 
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1)a) ad = ab,(given)
angle dac = bac (given) 
and,
ac=ac(common)
therefore , triangle dac is congruent to triangle bac by the criteria sss

b) CO = OD (given)
   angle A= angle B ( Alternate interior angles)
AO=OB (given)
therefore , triangle cao, is congruent to triangle dbo by the criteria sas

     
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dont know did not learn this chapter
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