三角形的角平分线、中线和高在中学数学中演绎出许许多多有趣的结论．直角三角形是三角形中一类特别的图形．直角三角形易与勾股定理、面积、平面直角坐标系及圆中的线段等产生联系,构造出不少综合问题,所以直角三角形也具有举足轻重的地位．本文谈一谈直角三角形中的角平分线、中线及高的计算方法． The angle bisector, the midline, and the height of the triangle deduce many interesting conclusions in middle school mathematics. A right triangle is a special type of graphic in a triangle. Right triangles are easy to connect with Pythagorean theorem, area, plane rectangular coordinate system, and line segments in circles, and many complex problems are constructed. Therefore, right triangles also play a decisive role. This article talks about the calculation of the angle bisector, midline and height in a right triangle.