SAT Geometry — concept by concept
Every concept taught from 8th-grade basics, then built up question by question until you hit SAT level. Free, no account needed.
How each concept works: a Concept Overview teaches the idea, then two tabs —
Build (questions climb from basic to SAT level so you understand it step by step) and
Hard Test (already know it? take only the exhaustive hard set — solve it and no SAT question on that concept can stump you). Your time is the asset — skip what you already know.
1
Lines & Angles
From what an angle is, all the way to SAT-hard parallel-line algebra.
2Polygons & Quadrilaterals
From 'what is a quadrilateral' (Kumon style) up to SAT diagonal rules and polygon-angle algebra.
3Triangles
Angle sum, exterior angle, the inequality, isosceles logic, area, and Pythagoras — to SAT level.
4Special Right Triangles
45-45-90 and 30-60-90 on sight — the SAT's favorite shortcut, including hidden ones.
5Similar Triangles
AA similarity, proportional sides, the side-splitter, and area ratio = k² — exactly SAT-deep.