Question

Find the angle x from the diagram shown below​

Answer 1

angle B+angle D=180°{ Linear Pair}

angle B= 180°-angle D

angle B=180°-130°

angle B= 50°

In ∆ABC,

angle A+angle B+ angle C=180°{ Angle sum property of triangles}

x+50°+90°=180°{ Angle A=90° because it is a right angled triangle}

x=180°-140°

x=40°