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Math.com Homework Help Geometry
Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents, and everyone can find solutions to their math problems instantly.

Geometry - GeoGebra
Interactive, free online geometry tool from GeoGebra: create triangles, circles, angles, transformations and much more!

Volume Formulas - math
Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents, and everyone can find solutions to their math problems instantly.

Create Custom Pre-Algebra, Algebra 1, Geometry, Algebra 2 ...
Software for math teachers that creates custom worksheets in a matter of minutes. Try for free. Available for Pre-Algebra, Algebra 1, Geometry, Algebra 2, Precalculus, and Calculus.

Geometry & Measurement - Starfall
Geometry & Measurement - Starfall

National Library of Virtual Manipulatives
A digital library containing Java applets and activities for K-12 mathematics

Geometria - GeoGebra
Ferramente on-line gratuita e interativa do GeoGebra: crie triângulos, círculos, ângulos, transformações e muito mais!

Molecular Geometry - Oklahoma State University–Stillwater
For trigonal pyramidal geometry the bond angle is slightly less than 109.5 degrees, around 107 degrees. For bent molecular geometry when the electron-pair geometry is tetrahedral the bond angle is around 105 degrees. Lets consider the Lewis structure for CCl 4. We can draw the Lewis structure on a sheet of paper. The most convenient way is ...

Measurement - Starfall
Measurement - Starfall

Perimeter
Perimeter is the distance around a two-dimensional shape. Example: the perimeter of this rectangle is 7+3+7+3 = 20. Example: the perimeter of this regular pentagon is:. 3 + 3 + 3 + 3 + 3 = 5×3 = 15