Question

ABCD IS A RHOMBUS SUCH THAT ANGLE ACB=50 FIND ANGLE ADB

Answer 1

If this is proportional so we can use tan/ sin... and theeta . and if it is proportional so the angle will will same 50 degemrees

Answer 2

Angle ACB =50°
since diagonals of rhombus are perpendicular to each other.
=> angle AOD=90°
Also angle DAC=50° .... (ALTERNATE ANGLES)
Now in ∆AOD
<A+<O+<D=180°
50+90+<ADB=180°
<ADB=180-140
<ADB=40°