An obtuse angle is one that is more than 90 degrees, but less than 180 degrees.

钝角是大于九十度同时小于一百八十度的角。

That makes it seems like you’re doomed to keep creating obtuse angles.

这使您似乎注定要继续创建钝角。

He occupied himself with teaching maths, such as teaching obtuse angles.

他从事数学教学，比如教什么钝角之类。

While this seems doable at first, there’s a hidden difficulty when it comes to avoiding obtuse and right angles.

虽然乍一看这似乎可行，但在避免钝角和直角方面存在一个隐藏的困难。

Every time you make a cut that reaches an edge, it either makes an acute and an obtuse angle, or two right angles.

每次切割到达边缘时，它要么形成一个锐角和一个钝角， 要么形成两个直角。

If our table is 'really' rectangular, it will look, from almost all points of view, as if it had two acute angles and two obtuse angles.

如果我们的桌子“真的” 是长方形的， 从几乎所有的角度来看， 它看起来都好像有两个锐角和两个钝角。