Free Geometry Formulas Flashcards

Geometry exams are generous to anyone with instant formula recall — the shapes rotate, the formulas repeat. These are the area, volume, and angle facts that carry most problems.

Study these 10 starter cards

QUESTION

Tap the card to reveal the answer

QArea of a circle?

AA = πr²

QCircumference of a circle?

AC = 2πr

QWhat is the Pythagorean theorem?

Aa² + b² = c² (right triangles)

QArea of a triangle?

AA = ½ × base × height

QSum of interior angles in a triangle?

A180°

QVolume of a sphere?

AV = (4/3)πr³

QVolume of a cylinder?

AV = πr²h

QSum of interior angles of a polygon with n sides?

A(n − 2) × 180°

QArea of a trapezoid?

AA = ½(a + b) × h (average the parallel sides, times height)

QWhat is π to four decimal places?

A3.1416

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How to study geometry formulas with flashcards

One fact per card. Sketch the shape mentally as you answer — attaching each formula to its picture halves the confusion between similar ones.
Rate honestly. After each card, choose Again, Hard, Good, or Easy — the spaced repetition algorithm uses your answer to decide when the card returns, right before you'd forget it.
A few minutes daily beats marathons. Ten new cards a day is roughly 3,650 a year, retained. Deep dives: Flashcards for programmers · How to make flashcards that actually work.

Free Geometry Formulas Flashcards

Study these 10 starter cards

Turn these into lasting memory

How to study geometry formulas with flashcards

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