Circles appear everywhere: wheels, clocks, plates, and more.

Learn the terms: radius, diameter, circumference, and area.

The formula for circumference is 2πr, where r is the radius.

π (pi) is an important constant used in all circle calculations.

Arcs and sectors divide a circle into useful parts.

Circle geometry is used in engineering designs like gears.

Traffic roundabouts rely on circular layouts for flow.

Circular motion appears in fans, planets, and machines.

Designers use concentric circles in art and architecture.

Mastering circle properties unlocks practical problem-solving.