Arc length The circumference of a circle = π d or 2 π r. Look at the sector of the circle shown below. To calculate the length of the arc, we need to know what fraction of the circle is shown.

GCSE Edexcel Circles, sectors and arcs - Edexcel Arc length The circumference of a circle is its outside edge, and is the same distance from the centre at every point along its length.

Auxiliary circles can help you solve problems that involve circles or arcs, such as finding the center, radius, tangent, or chord of a circle, or dividing a circle into equal parts.

A library for handling geometry on the surface of a sphere. This library combines spherical and vector geometry to perform operations with points, great circles, great circle arcs... A great circle is ...

A geometry compass uses lead or a pencil to draw smooth circles and arcs in a variety of sizes. Sold on their own or in sets that include other commonly use math accessories, including protractors and ...