Math for Everybody - Easy, Simple, Fun
Quatr.us answers questions

Simple Math

parts of a circle
The parts of a circle

Numbers

3-D Solids

Algebra

Simple Operations

Circles

Math Projects

Geometry

Triangles

Quadrilaterals

Bibliography and further reading about math:

Physics
History of Mathematics
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Professor Carr

Karen Eva Carr, PhD.
Assoc. Professor Emerita, History
Portland State University

Professor Carr holds a B.A. with high honors from Cornell University in classics and archaeology, and her M.A. and PhD. from the University of Michigan in Classical Art and Archaeology. She has excavated in Scotland, Cyprus, Greece, Israel, and Tunisia, and she has been teaching history to university students for a very long time.

Professor Carr's PSU page

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Quatr.us supports Black Lives Matter - here are some suggestions for how you can too! Read more about the history of Africans and African-Americans with our articles on the economy of medieval Africa, African scientific discoveries, black Americans and the Constitution, African-American slavery, the cotton gin, and the civil rights movement.