two kinds of shapes when an object is placed in a picture plane area are called

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The two kinds of shapes when an object is placed in a picture plane area are called positive shapes and negative shapes.

Explanation:
When an object is placed in a picture plane area, it creates both positive and negative shapes.

Positive shapes: These are the actual physical shapes of the objects themselves. They can be geometric shapes like squares, circles, or triangles, or they can be organic shapes like the outline of a person or a tree.

Negative shapes: These are the spaces or areas around the positive shapes. They are the shapes that are defined by the boundaries of the positive shapes. For example, if you have a large circle as a positive shape, the space around it would be the negative shape. Negative shapes are just as important in a composition as positive shapes, as they help define the overall composition and create a sense of balance and harmony.

To identify positive and negative shapes in a picture plane area, you can follow these steps:
1. Look at the objects or elements present in the image.
2. Focus on the outline or boundary of each object.
3. Identify the shapes created by the objects themselves. These are the positive shapes.
4. Pay attention to the space around the objects and how it interacts with them. These are the negative shapes.

By analyzing the positive and negative shapes within a picture plane area, artists and designers can create visually interesting and balanced compositions.