Right triangle: One of the three angles is a right Angle. The other two are acute angles.

直角三角形：有一个角是直角，有两个角是锐角。

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Obtuse triangle: One of the three angles is an obtuse Angle. The other two are acute angles.

钝角三角形：有一个角是钝角，有两个角是锐角。

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On this basis, the subject, pattern, language and style of the fictions that suit these three angles are deeply analysed.

在此基础上，对这三种视角所适用的小说题材、模式、语言、风格等作具体而深入的分析。

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So again, if we think about that shape of that carbon atom, it's going to be trigonal planar, 120° it's going to have bond angles of 120 degrees, because we have this set up of having three hybrid orbitals.

如果我们考虑碳原子的形状，它是平面三角形，键角是，因为我们有这三个杂化轨道。

麻省理工公开课 - 化学原理课程节选

So if, in fact, we want to describe a wave function, we know that we need to describe it in terms of all three quantum numbers, and also as a function of our three positional factors, which are r, the radius, phi plus the two angles, theta and phi.

实际上，我们想描述波函数，我们知道我们需要,用这三个量子数来描述它，同样，波函数还是,三个位置变量的函数，它们是r半径，还有两个角度theta和。

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