Learn
Five units, five short lessons each. Finish a unit, then prove it in the quiz and skill test.
📐 Formula sheet
Given on test day: circle A = πr², C = 2πr · rectangle A = lw · triangle A = ½bh · a² + b² = c² · 30-60-90 (x, x√3, 2x) · 45-45-90 (s, s, s√2) · volumes: box lwh, cylinder πr²h, sphere ⁴⁄₃πr³, cone ⅓πr²h, pyramid ⅓lwh · 360° in a circle, 2π radians, 180° in a triangle.
Memorize: slope, quadratic formula, discriminant, percent change, exponential growth, circle equation (x−h)² + (y−k)² = r², SOHCAHTOA, π = 180°.