The angle between the lines online calculator

Online calculator which will help you to find the angle between the lines.
Two lines can have only three variants of the mutual arrangement to each other, they may coincide, be parallel, or intersect.
To determine the angle between the lines most interesting case is the angle between the intersecting (or intersecting) straight.
If two lines have one common point, then these lines are called intersecting.
The intersection point divides each of the lines into two beams between the beams intersecting lines form four angles (two acute and two obtuse angles).
The angle between two crossing straight lines is the smallest angle (acute), formed by the intersection of these lines.

Indicate the equations of lines:
x + y + = 0
x + y + = 0

The angle between the lines
radians =
degrees =