Abstract: An angle gage with which the accuracy of a specified angle can be checked in a variety of orientations or forms. The nine-sided flat and rigid template not only enables the interior as well as the exterior forms of a particular angle to be gauged, but the same gage can be used to check the corresponding chamfer angle, the angle's supplement and the half-angle. The compact size and advantageous placement of the various corners and edges provides an extremely versatile, inexpensive and easy-to-use checking tool. A set of such gages corresponding to an incremented range of angles enables angle measurement of most contours to be made.