Important note before uploading:
I recommend correcting the Area of Circle formula first. It should be:

A = πr²

The formula πr² / 4 is only correct if you are using the diameter formula as A = πd² / 4.

TPT Description:

Support geometry students with this clear Circle Formulas Poster designed as a quick math reference for learning and reviewing important circle formulas.

This printable poster includes key circle vocabulary and formulas for radius, diameter, circumference, area, arc length, sector area, segment area, circle equations, and semicircle formulas. The clean notebook style layout makes it easy for students to use during lessons, homework, test review, or independent math practice.

What is included:

• 1 printable circle formulas poster
• Basic circle terms
• Circumference formulas
• Area of a circle formula
• Arc length formulas in degrees and radians
• Sector area formulas
• Segment area reference
• Equation of a circle
• Semicircle area and perimeter formulas

Best for:

Geometry, middle school math, high school math, Algebra 2 review, trigonometry connections, homeschool math, test preparation, interactive notebooks, classroom posters, formula reference sheets, and student study guides.

Use this poster as a helpful visual reference to support students as they review circle formulas, solve geometry problems, and build confidence with math notation.