widehat{A}+widehat{B}+widehat{C}+widehat{D}=360^{o} Learn more widehat{A}+widehat{B}+widehat{C}+widehat{D}=360^{o} Learn more widehat{A}+widehat{B}+widehat{C}+widehat{D}=360^{o} Learn more widehat{A}+widehat{B}+widehat{C}+widehat{D}=360^{o} Learn more