Ответ:
OAB=OAD=OCD=BCO=30⁰
A=C=30⁰×2=60⁰
B=D=180⁰-60⁰=120⁰
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Ответ:
OAB=OAD=OCD=BCO=30⁰
A=C=30⁰×2=60⁰
B=D=180⁰-60⁰=120⁰