need help solving this pls
\(\text{m}\overset { \frown} {CD}\,=\,360°-89°-126°\,=\,145°\)
\(m\angle CBD\,=\,\frac12(\,\text{m}\overset{\frown}{CD}\,)\,=\,\frac12(145°)\,=\,72.5°\)
