Question

Solve this Question .​

Answer 1

join AB

NOW from figure ,

ABC IS A TRIANGLE ,

55 + (30+ DCB) +( 45+ CBD) = 180 ....(..ANGLE SUM PROPERTY )

130 + DCB + CBD= 180

ANGLE DCB + ANGLE CBD = 50...... ....(name this as first)

NOW IN TRIANGLE CBD

ANGLE DCB+ ANGLE CBD + X = 180 ...( ANGLE SUM PROPERTY OF A TRIANGLE)

from ist

50 + x = 180

THEREFORE x = 130 degree

Answer 2

130degree

(•‿•)I hope it will help you