Take cutting potatoes as an example.

1, the potatoes peeled off the exterior, rinsed with water, standing on the board.

2, with a knife to cut off the two sides of the potato in a parallel shape, the potatoes become oval flat slices.

3. Cut the other two sides of the potatoes into flat slices, and the potatoes will become long strips.

4, cut off the sides of the potatoes, cut is no longer a straight knife down two right angles, but one side of the obtuse angle, one side of the acute angle, the other side of the parallel with the potatoes at this time is a rhombus-shaped square.

5, in the rhombic side of the knife cut down the potatoes that are rhombic slices.