直角三角形（勾股定理）计算器
| 勾股定理 | c 2 = a 2 + b 2 |
| 面积 | a × b / 2 |
| c边的高 (h) | a × b / c |
| a边角平分线 | 2 × b × c × Cos(A/2) / (b + c) |
| b边角平分线 | 2 × a × c × Cos(B/2) / (a + c) |
| c边角平分线 (t c ) | t c 2 = 2 × a 2 × b 2 / (a + b) 2 |
| a边中位线 ( m a ) | m a 2 = b 2 + 0.25 × a 2 |
| b边中位线 ( m b ) | m b 2 = a 2 + 0.25 × b 2 |
| c 边中位线( m c ) | m c = c / 2 |
| 内切圆半径 | a × b / ( a + b + c ) |
| 外接圆半径 | c / 2 |