sight triangle

例句：

1. 1.The sight triangle is a tool used to measure the angle of an object in relation to the horizon.
   视野三角形是一种用于测量物体相对于地平线角度的工具。
2. 2. In architectural design, the sight triangle helps architects determine the best positioning for windows and doors.
   在建筑设计中，视野三角形帮助建筑师确定窗户和门的最佳位置。
3. 3.When flying over mountains, pilots use the sight triangle to calculate the distance between them and the ground.
   飞行员在飞行越过山脉时使用视野三角形来计算他们与地面之间的距离。