An acute angle is less than 90°. It might look small and sharp, like the corner in a slice of pizza. An obtuse angle is between 90° and 180°. It’s wider than a right angle but not a straight ...

It is a perfect 90°, which is often shown by a small square drawn in between the two lines An obtuse angle is an angle ... You can see it's an acute angle, so it's less than 90°.

This file defines 3D masks for applying chamfers, roundovers, and teardrop roundovers to straight edges and circular edges in three dimensions.