Answer:
[tex] m\widehat {BDA} = 222\degree [/tex]
Step-by-step explanation:
[tex] m\widehat {BDA} = 360\degree -(m\widehat {AC} +m\widehat {CB}) [/tex]
[tex] m\widehat {BDA} = 360\degree - (90\degree +48\degree) [/tex]
[tex] m\widehat {BDA} = 360\degree - 138\degree [/tex]
[tex] m\widehat {BDA} = 222\degree [/tex]
