Question

in the adjoining fig, ABCD is a rhobus​

Answer 1

opposite angles of rhombus are equal.can use sum of all angles of triangle is 180°

Answer 2

see

if a=70 then c=70

from this we can say that the other two angles are also equal so let them be 2x

so from angle sum property of quadrilaterals we get

2x +70+70=360

=2x=220

x=110

**now notice that DB is an angle bisector of the angle ADC

therefore the answer is 110/2

=55

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