Circles — Digital SAT SAT Math revision notes
A 3-page visual revision sheet for Circles, written for Digital SAT SAT Math. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
What this Circles sheet covers
- Degrees, radians and what the sheet gives you
- The lines to memorise
- circumference and area, both given on the sheet
- degrees into radians
- radians into degrees
- arc length, angle in degrees
- sector area, angle in degrees
- arc length when the angle is already in radians
- Worked: a conversion each way
- An arc and a sector are just fractions of the whole
- Worked: the area of a sector
- Symbols and terms
- Worked: centre and radius from an expanded equation
- The equation of a circle is Pythagoras in disguise
- Traps that cost points
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans SAT Math chapter by chapter against your real exam dates and free hours, and when the plan reaches Circles the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.
More SAT Math revision notes
- Area and Volume
- Equivalent Expressions and Polynomials
- Evaluating Statistical Claims
- Inference and Margin of Error
- Linear Equations
- Linear Functions
- Linear Inequalities
- Lines, Angles, Triangles
- Nonlinear Equations in One Variable
- Nonlinear Functions
- Nonlinear Systems
- One-variable Data
- Percentages
- Probability and Conditional Probability
- Ratios, Rates and Proportions
- Systems of Equations
- Triangles and Trigonometry
- Two-variable Data
- Units, Rates and Conversions