Draw a rough sketch of a regular octagon. (Use squared paper if you wish). Draw a rectangle by joining exactly four of the vertices of the octagon.

Explanation

To solve the problem of drawing a rough sketch of a regular octagon and then drawing a rectangle by joining exactly four of its vertices, follow these steps:

### Step 1: Draw the Regular Octagon
1. **Start by drawing a horizontal line**. This will be one of the sides of the octagon.
2. **From each endpoint of the line, draw two lines at an angle of 135 degrees** to the horizontal line. These will be the next two sides of the octagon.
3. **Continue this process** by drawing two more lines at 135 degrees from the endpoints of the last two lines, until you have eight sides in total.
4. **Connect the last two endpoints** to complete the octagon.

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