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- Algebra I Archive
- 1: Curriculum Components
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- 2A: Contemplate then Calculate
- 2B: Connecting Representations
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- 2D: Additional Instructional Routines
- 3: ELL and SpEd Student Support
- A1 U0: Introduction to Algebra I
- A1 U1: Modeling with Functions
- A1 U2: Linear and Exponential Functions
- A1 U3: Linear Equations and Inequalities in One Variable
- A1 U4: Linear Equations and Inequalities in Two Variables
- A1 U5: Quadratic Functions
- A1 U6: Quadratic Equations
- A1 U7: Statistics
- Geometry & Algebra II Archive
- Geo U0: Introduction to Geometry
- Geo U1: Tools of Geometry
- Geo U2: Proofs about Congruence
- Geo U3: Similarity and Proof
- Geo U4: Right Triangle Trigonometry
- Geo U5: Extending to Three Dimensions
- Geo U6: Coordinate Geometry
- Geo U6: Circles
- A2 U0: Introduction to Algebra II
- A2 U1: Families of Functions
- A2 U2: Exponential Functions
- A2 U3: Trigonometric Functions
- A2 U4: Rational and Polynomial Functions
- A2 U5: Probability
- A2 U6: Statistics (Inferences from Data)
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Resource:
Slope criterion for perpendicular lines
The goal of this task is to use similar triangles to establish the slope criterion for perpendicular lines. Students need to be familiar with scaling and with the side-side-side congruence criterion.
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Geo U6Coordinate Geometry