Area vs Circumference

A circular swimming pool is 21 feet in diameter.  How many feet of tile surrounds the pool?
To solve, would we find area or circumference?

Cynthia wants to buy a round photo frame for
her brother. The radius of the photo frame is 9 cm.   If her picture is 5 inches by 7 inches, will it fit in the frame?
To solve, would we find area or circumference?

Steven purchases a punch bowl for a gift. The diameter of the bowl is 14 cm. How much wrapping paper does Steven need to cover the gift?
To solve, would we find area or circumference?

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the length around the hoop?
To solve, would we find area, circumference, or neither?

A clock face has a diameter of 10 inches. The clock face is made of wood.  How much wood covers the clock face?

A bicycle tire has a diameter of 27 inches. How far does the bike travel along the ground when the wheel rotates once?
To solve, would we find area, circumference, or neither?

A cruise ship has a large, circular window. It has a diameter of 6 meters. To measure a curtain, would we find area, circumference, or neither?

A circular race track has a diameter of 1/2 mile. How far does a car travel in one lap around the track?

The London Eye has a diameter of 120 meters. If you are sitting in one of the capsules, about how far do you travel in one rotation of the Ferris wheel?

The homeowners association wants to enclose the playground in a fence. How much fencing will they need to purchase? Is this question finding the area, circumference, or neither?