A ____ is a simple machine with two inclined planes put together forming a sharpened edge.

Explanation

To solve the question, we need to identify the simple machine described. The question states that it is a simple machine made up of two inclined planes that come together to form a sharpened edge.

### Step-by-Step Solution:

1. **Understand the Definition**: The question describes a simple machine that consists of two inclined planes. An inclined plane is a flat surface that is tilted at an angle to the horizontal.

2. **Identify the Characteristics**: The key characteristic mentioned is that these two inclined planes are put together to form a sharpened edge. This indicates that the machine is used to cut or split materials.

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