Question

angle

Accepted Answer

the difference between the direction of two lines or surfaces that come together; the space or shape formed when two lines or surfaces meet each other

The two lines form a sharp angle. = The two lines meet/intersect at a sharp angle (to each other).
The two lines meet at a 30-degree angle to each other. = There is a 30-degree angle between the two lines.

Front	angle
Back	the difference between the direction of two lines or surfaces that come together; the space or shape formed when two lines or surfaces meet each other The two lines form a sharp angle. = The two lines meet/intersect at a sharp angle (to each other). The two lines meet at a 30-degree angle to each other. = There is a 30-degree angle between the two lines.

Lines Angle Surfaces Meet Sharp 30 Degree Difference Direction