May hurt a little bit, but try as much as possible to create a 90 degree angle.
可能有点痛,尽可能形成一个直角。
Now take these two fingers-- the middle finger and the thumb-- and as much as possible, from that 90 degree angle, create a circle.
再让这两个手指-,中指和姆指-,尽可能保持直角时围成一个圆圈。
And, moreover, they are at right angles to one another that we've learned.
更多的是,根据我们所学的知识,它们都是和另外一个互成直角。
I want to compute the length of the hypotenuse of a right triangle.
我想计算下,直角三角形的斜边。
So-- if you don't feel comfortable doing it, don't do it-- what I'd like to do now is as following: Take your thumb and your middle finger and create as much as possible a 90 degree angle.
感觉不舒服的,就不要做,希望按下面的指示做:,让你的姆指和中指,尽可能形成一个直角。
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