They are used to file the surfaces of acute internal angles.

It went down at an acute angle for some fifty feet, the floor being covered with broken stone.

The process starts by bending the edge to an acute angle.

It may be defined as the acute angle between two lines normal to the planes.

The neck could be of varying length; it met the body at an acute angle.

He has just cut off the end of the pole at an acute angle to make it into a spear.

Unusually, the stand runs at an acute angle to the goal line.

From her current acute angle she cannot tell what it is.

It formed an acute angle such as is never found in nature.

His long fingers assume acute angles as they work inside the mouth.