Give your scholars the support they need to work with formulas. A reference page offers definitions and picture examples of perimeter, area, surface area, volume, the Pythagorean theorem, a variety of shapes, and more. 

What do you create when you rotate a ray? An angle! Teach all the angle basics including naming, measuring, supplements, and complements. 

Address key vocabulary in the seventh grade Common Core Math Standards with this comprehensive list. A series of word cards is also provided that supports each term with images and examples, making this an excellent tool for teaching the...

Geometry is full of shapes, figures, and corresponding things here and there. The guide shares all of the key pieces of geometric information in a nicely color-coded and labeled sheet. 

Stuck trying to remember the formal language of a geometric proof? Never fear, this handout has them all ready to go. The reasons are sectioned by topic so this handy guide is ready when you are to tackle those two column proofs. 

Brush up on your math skills relating to complementary angles then try some practice problems to test your understanding.

Learn about complementary angles with this handy reference guide. Provides a detailed definition and an interactive activity that enhances further explanation. Includes links to related topics.

This site gives a good definition of "complementary goods" and provides examples. It also explains how when the price of Good A changes, the demand curve for Good B will shift.

This tutorial provides a short definition of complementary angles.

The concept of colors is discussed on this page. Read about primary colors, how complementary colors are created, what the process of color subtraction is, pigments and dyes, plus more. Also included are interactive Java tutorials.

A great introduction to color theory with colorful illustrations and examples.

Golden Artist Colors presents a guide to mixing acrylic paint. An explanation of color theory and mixing color with paint is included on this site. There are also color charts and exercises that can be done with paint that explore how...

Everything you wanted to know about angles and more, including 1) how to measure angles 2) types of angles 3) angle relationships and 4) angles around a transversal.

Information about the causes and treatments of varicose veins. Includes sections on signs and symptoms, causes, risk factors, when to seek medical advice, diagnosis, complications, treatments, prevention, self-care, and complementary and...

A list of geometry definitions and a matching activity.

Intermath Dictionary's site defines terms relating to angles, gives examples, and offers interactive exercises.

Explains the terms and symbols used to discuss line angles, what an angle is, and the types of angles. Includes short video lesson demonstrating how to use a protractor to measure an angle. [0:57]

This study guide on angles covers key vocabulary, ways to name angles, how to measure them, the Protractor Postulate and the Angle Addition Postulate, types of angles, congruent angles, angle bisectors, and angle pairs. It is available...

An in-depth instructional page on color that defines a variety of terms related to color.