几何计算器
计算面积、周长和体积,求解三角形、圆、三角函数和坐标几何问题,并查看按比例绘制的图形。
12 个计算器 · 103 个已验证示例
平面图形
立体图形
三角形
三角函数
坐标
角度
选择计算器:几何
Distinguish the boundary, face and solid
Perimeter measures a boundary in units of length. Area covers a flat face in squared units, while volume fills a solid in cubed units. For a room floor, choose area; for a container's capacity, choose volume. Surface area counts the faces you would cover or paint. A circle tool takes radius or diameter, and confusing the two changes area by a factor of four. Use the labelled diagram to check what each measurement describes.
Choose the information you actually have
The right-triangle tool assumes a right angle; a general triangle solver supports other angle and side combinations. Some side-side-angle inputs produce two possible triangles, so inspect both solutions instead of choosing one silently. Coordinate tools are useful when measurements are points rather than side lengths. Convert all lengths to a consistent unit before comparing results, and remember that a mathematically exact shape may only approximate an irregular real object.