Use these printable posters with visuals and definitions to help your students learn about circles! The PDF includes a sign for each of these terms:CircumferenceAreaDiameterRadiusChordArcSectorSecantTangentAt the end is a student reference sheet with diameter, radius, chord, arc, sector, secant, and tangent. 2 printing versions are included: colorful or black ink only (which is great for printing on colorful paper).The 8.5 x 11 mini posters for area and circumference give the definition and for