Math Guides
Use this collection to move from a mathematical definition to a worked method and then to a calculator that checks the arithmetic. Each guide names the quantities and shows how the formula is arranged.
Core Math
Percentage Formulas Guide
Learn percent of a value, part of total, percent change, increase, decrease, and decimal conversion formulas with examples.
Read guideAlgebra
Slope and Intercept Explained
Understand slope, y-intercept, point-slope form, slope-intercept form, vertical lines, and how coordinate formulas connect.
Read guideGeometry
Area Formulas Printable Reference
Review rectangle, square, triangle, circle, trapezoid, parallelogram, and compound-shape area formulas with printable notes.
Read guideTrigonometry
Radians vs Degrees Guide
Learn radians vs degrees, conversion formulas, unit circle notation, pi multiples, and when each angle unit is useful.
Read guideStatistics
Basic Statistics Guide
Learn mean, median, mode, variance, standard deviation, percentile, and z-score formulas with examples and method notes.
Read guideHow to choose a guide
Choose a percentage guide for proportional change, slope and intercept for linear relationships, and formula references when you need notation or a step-by-step rearrangement.
Editorial method and source
Math content is checked by substituting worked examples back into the stated equation and by testing boundary inputs in the linked calculator.
Toolarithm editorial and calculation methodologyWho maintains this page
Ownership and review
Written and maintained by the Toolarithm editorial team. No review date is shown without a maintained editorial record. No independent professional review is claimed.
Methodology
The editorial team checks definitions, examples, linked tools, and cited references. Dates shown here come from the page's maintained publication record.
Read the editorial methodologyDates and sources
Review dates change only after a substantive method or content check.