When constructing parallelogram DABG, I started with circle A and copied it three times to make four congruent circles. I the lined them up to create lines AD and line BG. Because they are the radii of the same circle it makes the lines congruent. Next, I drew a new circle, A', with a radius of G and copied it three times making circles D', B', and G'. Then I created lines AB, AG, GD, and BD which are congruent since they are the radius' of two congruent circles. Since there are two pairs of congruent sides and the diagonals bisect, it is a parallelogram.