Here are some websites that can help you if you
have difficulty with some of the topics in Geometry, or if you
just want to explore and learn more.

KHAN
ACADEMY (Online videos of various
math topics, various levels. EXCELLENT site)

TEXTBOOK VIDEOS
(These videos that match the sections in the Prentice
Hall (Pearson) textbook. It's the SAME EXACT GEOMETRY as found
in the McDougal Littell textbook, just in a slightly different
order. Hunt around a bit in the chapters and sections to
find the topic you're looking for---it will be worth it. )

Math.com Geometry (very good site)

Geometry - Math for Morons Like Us

Geometry Online (Various Activities)

Geometry Terms (from mathleague.com)

Geometry (from thinkquest.com)

Geometry (from aaamath.com)

Interactive Geometry (from studyworksonline.com)

Interactive Mathematics Miscellany and Puzzles, Geometry Page

A Free On-Line Course in Geoemetry

Ask Dr. Math: High School Geometry

TRIGONOMETRY:

An Introduction
to Trigonometry