If three angles of a quadrilateral are 100∘ ,90∘ and 85∘, then the fourth angle is _____.

If three angles of a quadrilateral are 100∘ ,90∘ and 85∘, then t

1.	If three angles of a quadrilateral are 100∘ ,90∘ and 85∘, then the fourth angle is _____.
Answer» If three angles of a quadrilateral are $100^{\circ}$ , $90^{\circ}$ and $85^{\circ}$ , then the fourth angle is _____.