Question

In this question from where 90 degree has come can anybody explain me please ​

Answer 1

Step-by-step explanation:

We know that each angle of a square is 90°.

So, his/her answer is correct. ✌

Hope u fine. ¯\(◉‿◉)/¯

Answer 2

Answer:

In the question ABCD is a square.It is the property of a square to have each of it's interior angles to be 90 degrees.