These important formulas, theorems, and properties are vital to studying geometry. If you're working on a geometry problem and get stumped, go through these formulas and make sure you've applied them correctly:

These important formulas, theorems, and properties are vital to studying geometry. If you're working on a geometry problem and get stumped, go through these formulas and make sure you've applied them correctly:
Mark Ryan has more than three decades’ experience as a calculus teacher and tutor. He has a gift for mathematics and a gift for explaining it in plain English. He tutors students in all junior high and high school math courses as well as math test prep, and he’s the founder of The Math Center on Chicago’s North Shore. Ryan is the author of Calculus For Dummies, Calculus Essentials For Dummies, Geometry For Dummies, and several other math books.
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