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. 

This site displays formulas and examples, pertaining to slope, for parallel and perpendicular lines.

Detailed math tutorial features notes and examples that discuss graphing lines and introduces the concept of slope, the standard form of the line, the point-slope form, slope-intercept form, and parallel and perpendicular lines.

This comprehensive study guide highlights the main terms and formulas needed to review lines in the coordinate plane. Examples are included.

This comprehensive study guide highlights the main terms and formulas needed to determine the equation of a line. Examples are included.