Question

In the adjoining figure, ABCD is a rhombus, if A =70°, then CDB=

a)50°
b)55°
c)60°
d)68°​

Answer 1

By the properties of rhombus,We know that;

Sum of adjacent angles of a rhombus is equal to 180°.And opposite angles are equal.(i feel some mistake is there in question,but this is the method)

$\implies \angle CDA + \angle BAD = 180 \degree$

$\implies \angle CDA + 70 \degree = 180 \degree$

$\color{orange} \therefore \angle CDA = 180 \degree - 70 \degree = 110 \degree$

HOPE THAT HELPS!!