Opposite over hypotenuse is equal to sine of an angle.

斜边分之对边 的值即是 sin 函数的值。

So you have the opposite over the hypotenuse.

是对边比斜边。

You know, cosine is adjacent over hypotenuse.

你们知道 cos是边除以斜边。

And this comes straight out of this magnitude, which is opposite to the angle over the hypotenuse.

是因为个，它的值当分母。

I get it! Sin is opposite hypotenuse... Yes.

我懂了，正弦是对边比斜边。是的。

Root 2 simply is the hypotenuse of a right triangle

而 √2 只是两边长度为 1 的 直角三角形之斜边。

Root 2 simply is the hypotenuse of a right triangle with sides of a length one.

根号二只是一个边长为单位一的直角三角形的斜边长度罢了。

You know, I was blown away that the square of the hypotenuse was the sum of the squares of the opposite sides.

斜边平方等于直角边平方和可把我给惊呆了。