<strong>Step 9:</strong> Finally, to ensure SolidWorks knows we are creating a closed area, draw a line from the midpoint of the rectangle's bottom line to the edge of the rectangle.
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<strong>Step 9:</strong> Finally, to ensure SolidWorks knows we are creating a closed area, draw a line from the midpoint of the rectangle's bottom line to the edge of the rectangle (featured in purple in the screenshot).