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Dashboard / Workbook
Geometry 9-12

Welcome.

12 weeks · paper-style learning, on screen

Pick a week to start (or pick up where you left off). Each week has Mon-Fri lessons and a celebration recap.

ALL WEEKS

WEEK 01 · FREE

Points, Lines and the Chalk Grid

// Precise words and string-and-chalk constructions

MONTUEWEDTHUFRISAT
WEEK 02 · FREE

Rigid Motions and Symmetry

// The flats slide, flip and turn

MONTUEWEDTHUFRISAT
WEEK 03 · FREE

Congruence from Rigid Motions

// Two braces match when a sequence of motions carries one onto the other

MONTUEWEDTHUFRISAT
WEEK 04 · FREE

Proofs about Lines, Angles, Triangles and Parallelograms

// The parallelogram frame earns its name

MONTUEWEDTHUFRISAT
WEEK 05 · FREE

Dilations and Similarity

// The scale model and the flashlight

MONTUEWEDTHUFRISAT
WEEK 06 · FREE

Similar Triangles and Proof

// Shadows, side-splitters and the altitude

MONTUEWEDTHUFRISAT
WEEK 07 · FREE

Right Triangles and Trigonometry

// The ramp, the cable and the angle finder

MONTUEWEDTHUFRISAT
WEEK 08 · FREE

Circles

// The turntable and the spotlight

MONTUEWEDTHUFRISAT
WEEK 09 · FREE

Coordinates: Lines, Segments and Figures

// The taped stage grid

MONTUEWEDTHUFRISAT
WEEK 10 · FREE

Equations of Circles and Parabolas

// The turntable and the lamp dish on the stage grid

MONTUEWEDTHUFRISAT
WEEK 11 · FREE

Volume: Where the Formulas Come From

// Paint, foam and a jug of water

MONTUEWEDTHUFRISAT
WEEK 12 · FREE

Modeling the Set and Opening Night

// Every prop a shape, every plan a number

MONTUEWEDTHUFRISAT