SAT Math Geometry

Triangle Theorems

Apply 30-60-90, 45-45-90, similar triangles, and the Pythagorean theorem — with labeled diagrams and SAT strategy tips.

Special right triangles

Similar triangle ratios

Labeled diagram

Live

Triangle Mode

Mode

Short leg (opposite 30°)

Leg length

Known side a

Known side b (or hypotenuse)

Find

Triangle 1 sides (comma-separated)

Triangle 2 — known side (corresponding to first side of T1)

Result

Sides

Select mode and press Compute

Step-by-Step Solution

Triangle Diagram

SAT tutoring drills 30-60-90 and 45-45-90 ratios until you can apply them instantly — without memorizing a formula sheet.