Question

please​ solve these... please solve only last three questions..

Answer 1

Ans 10 is here in these two pictures

Answer 2

Formtwo triangles from diagonal ac.

In rriangle adc and triangle acb,

Ad equal bc ( opposite sides of parellelogram)

Ab equal dc(. “””””””””)

Angle adc equal angle abc ( opp angles of parellelogram)

So by sas rule triangles are congruent.
And angle acd equal angle acb ( by cpct)