Translations:Basic Part Design Tutorial 019/15/en

The master sketch contains the model's rectangular base shape and two named constraints that will supply correct dimensions to other parts of the model: length that will contain 53 mm (the result of adding the 39 mm dimension to the two 7 mm sides), and width that will contain 26 mm. To be able to take advantage of the model's symmetry in later steps, the top edge of the rectangle will be centered around the origin with a symmetrical constraint.