SAT Math Reference Sheet
The core facts for the Math section, in one printable page. Review it the night before; the section rewards fluency.
Linear & quadratic
| Slope-intercept form | y = mx + b |
| Slope through two points | (y₂ − y₁) / (x₂ − x₁) |
| Quadratic formula | x = (−b ± √(b² − 4ac)) / 2a |
| Vertex of a parabola | x = −b / 2a |
| Systems | Solve by substitution or elimination |
Geometry & trig
| Circle equation | (x − h)² + (y − k)² = r² |
| SOHCAHTOA | sin = opposite/hypotenuse · cos = adjacent/hypotenuse · tan = opposite/adjacent |
| Special right triangles | 45-45-90: x, x, x√2 · 30-60-90: x, x√3, 2x |
| Pythagoras | a² + b² = c² |
| Triangle area | ½ × base × height |
Numbers & data
| Percent | part = (percent / 100) × whole |
| Exponent rules | xᵃ · xᵇ = xᵃ⁺ᵇ · (xᵃ)ᵇ = xᵃᵇ |
| Mean / median / mode | Average / middle value / most frequent |
| Probability | favorable / total |