First, Put the model labeled "Geometry Set Top" on top of the model labeled "Geometry Set Bottom", and put the "2 Pins" through the holes on the left of the models, with the pins facing down. Next, Put the "Geometry Set Ruler" in to the larger rectangular section show in the image above, along with the "Geometry Set Square" in the same section, in the left corner. Now, Place your "Geometry Set Protractor" in to the right area of the same section. Finally, Insert the "Geometry Set Divider" into the upper, smaller rectangle section to divide the areas. Now you should be ready to use your Ultimate Geometry Set! Have fun!