A helpful scientific calculator that runs in your web browser window.
Holt Online Learning

News forum in a question and answer format
Geometry Junkyard

This site shows examples of different area probability problems using various shapes.
Geometric Probability

Lesson on Negation and Logic
Math Goodies

Book with illustrated examples on geometric probabilities
Comap

Lesson on Conjunction and Logic
Math Goodies

This is a quiz on finding the probability of shaded areas. Quiz gives hints and correct answers.
Glencoe Math

This site has several examples of finding the probability of areas.
Online Math Learning
