
CK12 Study Guide Library
 These CK12 study guides are written by fellow high school students. If you are having problems with Algebra I, Geometry, Probability and Statistics, Biology, Chemistry, or Physics, these study guides are for you.

Geometry
 This is a first year, highschool level course on Geometry (which is based on Euclid's elements). It revisits many of the basic geometrical concepts studied in earlier courses, but addresses them with more mathematical rigor. There is strong focus on proving theorems and results from basic postulates. Topics include: points, lines and planes; angles and intersecting lines; congruent triangles; perimeter, area and volume; similarity; triangles, quadrilaterals and circles; logical reasoning; and transformations.

Geometry
 Topics include dimensions, plane and solid geometry, polygons, circles, angles, coordinates, Pythagorus' Theorem, triangles, and more ...

Measurement Index
 Topics include metric and US standards, length, area, volume, mass, time and date, conversions, temprature, speed, direction, units, accuracy and precision...

Measurements
 This site provides resources for learning about measurement.