Geometry

Welcome to the geometry portion of the site! On this and the following pages, we'll try to clear up some of the common problems people have with geometry (which seems to stump just about everyone who's ever taken it). Everything from parallel lines to volumes of prisms and a couple of word problems are covered.

After each section there is an optional (though highly recommended) quiz that you can take to see if you've fully mastered the concepts. Don't forget to visit the message board and the formula database.

Follow any of the links below to go to the section you need help with.

Parallel Lines

Transversals
How to tell if lines are parallel
Using parallel lines to gather information about triangles

Congruent Triangles

Congruent Right Triangles

Isosceles and Equilateral Triangles

Quadrilaterals

Parallelograms

How to tell if it is a parallelogram

Ratios

Similar Polygons

Special conditions for triangles
Parallel intersections

Special Triangles

Circles

Chords and radii
Tangents
Congruent arcs
Inscribed angles
Angles involving tangents and/or secants
Segments
Circumference and arc length

Area

Coordinate Geometry

Midpoint formula
Slope
Equations
Distance formula

Triangle Inequality

Area and volume of solids

For all you computer nerds out there, we've included a section full of short QBasic programs that do basic geometry problems. Feel free to download them, use them, and improve them (they're freeware)!

Computer Fun

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