| Basics of Coordinate Metrology Unit 5: Geometric Combinations - Angle | Step 4 of 8 |
| Angle | Line | Plane | Cylinder |
| Line |  The specified angle of two intersecting lines is always the smaller of the two possible angles a and b. Hence: a + b = 180°. The angular relationship of non-intersecting lines is specified by the angle between the two direction vectors of the lines. |  The angle is the angle between the normal vector of the plane and the line. It is measured at the piercing point of the line through the plane. |  The angle is the angle between the cylinder axis and the line. The specified angle is always the smaller of the two possible angles a and b. Hence: a + b = 180°. If the cylinder axis and the line do not intersect, the angle between the two direction vectors is specified. |
| Plane |  The angle between the line and the plane is measured at the piercing point of the line through the plane. |  The angle taken as the angle of two non-parallel planes is the angle between the two normal vectors of the planes. The specified angle is always the smaller of the two possible angles a and b. Hence: a + b = 180°. |  The angle is the angle between the cylinder axis and the normal vector of the plane. |