In the proof of Theorem 17, which sides are taken as equal in $ riangle OAM$ and $ riangle OBM$?

Question

In the proof of Theorem 17, which sides are taken as equal in $	riangle OAM$ and $	riangle OBM$?

Accepted Answer

$OA=OB$, $AM=BM$, $OM=OM$

Answer

$OA=AM$, $OB=BM$, $OM=OM$

Answer

only $OA=OB$

Answer

$AM=OM$, $BM=OM$

In the proof of Theorem 17, which sides are taken as equal in △OAM\triangle OAM△OAM and △OBM\triangle OBM△OBM?