The Equation of a Line
Ninth graders explore the equation of a line. In this Algebra I lesson, 9th graders use Cabri Jr. to examine linear equations. Students explore the affect of changing parameters of the graph of the line.
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Proving Slope Criteria for Parallel & Perpendicular Lines
This lesson launches with learners graphing the fourth vertex of a given rectangle, and finding the length and slope of one of its sides; and ends with learners writing a summary sheet for parallel and perpendicular lines. In between,...
7th - 11th Math CCSS: Designed
Equations for Tangent Lines to Circles
Don't go off on a tangent while writing equations of tangent lines! Scholars determine the equations for tangent lines to circles. They attempt both concrete and abstract examples, such as a tangent line to the unit circle through (p, 0).
9th - 12th Math CCSS: Designed
Using Linear Equations to Define Geometric Solids
Making the transition from two-dimensional shapes to three-dimensional solids can be difficult for many geometry students. This comprehensive Common Core instructional activity starts with writing and graphing linear equations to define...
9th - 11th Math CCSS: Designed
Solving Systems of Linear Equations
Solving systems of equations underpins much of advanced algebra, especially linear algebra. Developing an intuition for the kinds and descriptions of solutions is key for success in those later courses. This intuition is exactly what...
8th - 9th Math CCSS: Adaptable
Writing Equations for Parallel Lines
Acquaint your class with the concept of parallel lines. Learners watch a PowerPoint presentation about how to write equations of parallel lines. Their understanding of linear equations and slope is taken a step further by the exercises...
8th - 11th Math CCSS: Designed