Every named part of a circle explained: center, radius, diameter, chord, arc, sector, segment, tangent, secant. Visual definitions,…
Every 3D solid formula in one place: cube, rectangular prism, cylinder, sphere, cone, pyramid. Volume + surface area…
Master the distance formula d = √((x₂−x₁)²+(y₂−y₁)²) and midpoint M = ((x₁+x₂)/2, (y₁+y₂)/2). Full derivation, worked examples, and…
Geometric sequence formula aₙ = a·rⁿ⁻¹ vs series Sₙ = a(1−rⁿ)/(1−r). When does the infinite sum converge? Worked…
Polygon angle formulas: interior sum (n−2)×180°, exterior sum 360° always, plus each angle for regular polygons. Worked examples…
The complete one-page cheat sheet of geometry formulas: area, perimeter, volume, surface area, angle sums, distance, midpoint, and…