Polar Array

Evenly distributes object copies in a circular pattern around a center point

Draw the polygon and circle

Home tab > Modify panel > Polar Array

Select the polygon, press Enter

Pick a center point

Items panel > Items: 12

Polygon array about the circle

Replace Item

Select the array objects

Options panel > Replace Item

Select the rectangle, press Enter

Press Enter again to confirm the base point

Select the objects in the array to replace