Circle circumference and area from the radius worksheets

What is on this worksheet

Every circle shows its radius, and students find both the circumference and the area in terms of pi.

• Picture shows: Radius

You can change any of these settings above. Press "New problems" for a fresh set with the same settings, or pick Version A to Z to print different sheets for neighboring desks. The answer key always matches.

About circumference and area of circles

Each circle is drawn with its radius or its diameter labeled. Students use C = 2πr and A = πr². Choose circumference, area or both, a radius or a diameter in the picture (or a mix), and whether to leave pi in the answer (14π) or to round to the hundredth with a calculator.

Every radius is a whole number, so answers in terms of pi are whole numbers of pi. The decimal answers are checked so that none sits on a rounding edge, and the answer key shows every answer.

Printing

US Letter or A4, portrait: choose your paper size above. Print at 100 percent (actual size). Use "Black and white" for the copier, or "Color" for display pages and mini books.