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Geometry: The Most Popular Parallelograms

The Most Popular ParallelogramsGeometryPutting Quadrilaterals in the ForefrontProperties of All QuadrilateralsProperties of TrapezoidsLet's All Fly a Kite!Properties of ParallelogramsThe Most Popular…

Geometry: Properties of Parallelograms

Properties of ParallelogramsGeometryPutting Quadrilaterals in the ForefrontProperties of All QuadrilateralsProperties of TrapezoidsLet's All Fly a Kite!Properties of ParallelogramsThe Most Popular…

Geometry: Proofs About Alternate Angles

Proofs About Alternate AnglesGeometryProving Relationships Between LinesProofs Involving Perpendicular LinesLet's Get ParallelProofs About Alternate AnglesParallel Lines and Supplementary AnglesUsing…

Race and Ethnicity

The Question: I am seeking the definition of race and ethnicity and the difference between the two. Why are they so often used interchangeably in our society…

The Devil's Dictionary: Everlasting

by Ambrose Bierce EVANGELISTEXCEPTIONEVERLASTING -adj. Lasting forever. It is with no small diffidence that I venture to offer this brief and elementary definition, for I am not unaware of…

Geometry: When Is a Parallelogram a Rectangle?

When Is a Parallelogram a Rectangle?GeometryProofs About QuadrilateralsWhen Is a Quadrilateral a Parallelogram?When Is a Parallelogram a Rectangle?When Is a Parallelogram a Rhombus?When Is a…

Editorial Assistant

Parna Mehrbani Tell us about your work-what do you do? I work for an organization affiliated with the University of Illinois . I am the editorial…

How often is bimonthly?

The Question: How often is a bimonthly meeting held? The Answer: Bimonthly is a problematic word, meaning either "occurring once every two…

Difference Between an Herb and a Spice

The Question: What is the difference between an herb and a spice? The Answer: The terms "spice" and "herb" have both been used to describe parts of plants (possibly dried) that are used to…

Geometry: From One Theorem Comes Many

From One Theorem Comes ManyGeometryAnatomy of a CircleBasic TermsArcsCircumference and Area: Pi Anyone?TangentsFrom One Theorem Comes Many You haven't had a proof in awhile. “Never let a section…