Labels:text | screenshot | diagram | circle | font OCR: Area Enclosed Between Two Concentric Circles "4" r ENTER: *Radius "r" ---- >|1 C R Units *Radius "R" ---- >F Units ANSWERS: Total Perimeter=E Units Area= Square =5 Units Th US Tab or double-click in field, enter what you know , then click any where on card to calcu- late the shadowed fields.