Lights Out

Author:Steven Schlicker

Black is off, yellow is on. Play to turn all lights off. Click cells to change the state of adjacent cells. Use Click to Design to create your own game.

Based on a GeoGebra applet by Yin Su and Stephen Jull

New Resources

Number Puzzle
Property of the Perpendicular Bisector - Converse
Constructing Incircle
z`]]
triangular grid

Discover Resources

Parallel Lines Cut by a Transversal
Circle Geometry - angle in a semi-circle
Untitled
Surface Area: Intuitive Introduction
Interactive Rectangle Area

Discover Topics

Orthocenter
Random Variables
LCM and GCD
Pythagoras or Pythagorean Theorem
Prism