三角形的面积公式

The formula for the area of a triangle

以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译

1
这就是空间三角形的面积公式。
That's the formula we've seen for the area of a triangle in space.
2
推导出用三顶点的测地坐标计算地球椭球面上三角形面积的公式。
The formula for area of triangle on ellipsoid by means of geodesic coordinate is derived in this paper.
3
摘要把紧密相连的圆环构成的圆盘以渐开线展开成等面积的直角三角形，得出了较为直观的由周长和半径表示的圆面积公式。
The disk, which is composed of continuous annuluses, can expand equivalent trangle by asymptotice line. We can obtain the circular area which is visually expressed by circumference and radius.

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