b: \(\widehat{ACB}+\widehat{B}=90^0\)
\(\widehat{HAB}+\widehat{B}=90^0\)
Do đó: \(\widehat{ACB}=\widehat{HAB}\)
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b: \(\widehat{ACB}+\widehat{B}=90^0\)
\(\widehat{HAB}+\widehat{B}=90^0\)
Do đó: \(\widehat{ACB}=\widehat{HAB}\)