Question

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Answer 1

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Answer 2

Answer:

1.. AB = AD

BC= CD

AC = AC

therefore it is congruent by SSS

2. AB = AD

AO = AO

angles BoC = AOD

therefore AOB = AOD

3. AOB = AOD cpct

AOB + AOD = 180

AOB = AOD = 90

Ac pependicular

4. BO = OD cpct