Diamond Exercise

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Diamond pattern exercise: Divide A D and A B into 4 equal parts, then draw horizontal lines through E, F, and G and vertical lines through L, M, and N. Draw lines from A and B to the intersection O of lines E and M, and from A and D to the intersection P of lines F and L. Similarly, draw D J, J C, C I, and I B. Also connect the points O, P, J, and I, thus forming a square. The four diamond-shaped areas are formed by drawing lines from the middle points of A D, A B, B C, and D C to the middle points of lines A P, A O, O B, I B, etc.


Kenison, Ervin Mechanical Drawing (Chicago, IL: American School of Correspondence, 1916)


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