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Math » Algebra
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Question #2 of 'Properties of Parallelograms',... Find the values of AB and x when BC=26, CD=22, and DA=2x+12.

Collected Learning Units in Mathematics provides more than 200 instructional units in arithmetic, algebra, calculus, data...
Riemann zeta function

MathDL provides Java applets, interactive modules, and Flash presentations for studying...
See caption below

Figure This! offers interactive math problems families can use to help children understand estimation...
Hermann Oberth, a transplanted Romanian, vigorously promoted the idea of spaceflight.

From Stargazers to Starships is a self-contained book-on-the-web course on basic astronomy, Newtonian mechanics, the...

National Security Agency

National Science Foundation

Multiple Agencies

NASA
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