There are a few ways to make a half circle in Illustrator. The easiest way is to use the Polygonal tool. To make a half circle with the Polygonal tool, click on the polygonal button and then drag the cursor around the area you want to create a half circle from. The polygonal button will create a perfect half circle every time. Another way to make a half circle is to use the Ellipse tool. To make an ellipse with the Ellipse tool, click on the ellipse button and then drag the cursor around the area you want to create an ellipse from. The ellipse button will create perfect ellipses every time.
