例如，直角三角形斜边的平方，等于其它两边的平方和。

For example the square on hypotenuse of a right Angle triangle is equal to the sum of the squares of the other two sides.

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直角三角形的斜边是直角三角形中最长的边。

The hypotenuse is the longest side of a right triangle.

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一些人需要复习一点数学课程，正弦的作用是给出在一个直角三角形中的一个已知角所对应的一条边与直角三角形斜边之间的比率。

For anyone that needs a little refresher course, the sine function gives the ratio of the opposite side of a given Angle in a right triangle to the hypotenuse.

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