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Trigonometry

SequencesLessonsMaterialsVideos
  1. Math

Trigonometry

SequencesLessonsMaterialsVideos
SequencesLessonsMaterialsVideos

Right triangle ratios, unit circle definitions, and fundamental identities applied to angles and geometric relationships. Models periodic phenomena using trigonometric functions to analyze real-world cycles and waveforms.

Trigonometric Ratios Involving Right TrianglesSine, cosine, and tangent relationships defined within right-angled triangles. Applies these ratios to calculate unknown side lengths and angle measures in geometric and real-world contexts.
Sequence
Ratio Rig Facilitation Guide
Ratio Rig Slides
Side Sleuths Worksheet
Trig Talk Vocab Map
Trig Check Exit Ticket

Triangle Tech

A series of targeted intervention lessons designed to bridge the gap between triangle similarity and basic trigonometry, focusing on conceptual understanding and ratio consistency.

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Lenny
2/12
Sequence
Trig Intervention Guide
Trig Blueprint Slides
Trig Blueprint Worksheet
Surveying Success Exit Ticket

Trigonometry Blueprint

A targeted intervention sequence for High School Geometry students to master the Laws of Sines and Cosines through scaffolded proofs and practical application. The materials use a blueprint-inspired visual theme to emphasize the structural nature of trigonometry.

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Lenny
2/12
Sequence
Navigator Teacher Guide
Navigator Slides
Strategy Blueprint Guide
Mission Briefing Worksheet

Triangle Mastery

A specialized intervention sequence designed for high school geometry students to master solving non-right triangles using the Law of Sines and Law of Cosines, with a focus on decision-making and scaffolded practice.

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Lenny
2/12
Sequence
Precision Path Teacher Guide
Inverse Intel Slides
Signal Solver Worksheet

Trig Tactics

A series of targeted interventions for high school students to master trigonometric functions and their applications in real-world modeling.

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Lenny
2/12
Sequence
Special Triangle Facilitation Guide
Trig Specs Slides
Trig Blueprint Worksheet
Angle Hunter Exit Ticket
Trig Blueprint Answer Key
Angle Hunter Answer Key

Trig Blueprints

A Tier 2 intervention sequence focused on foundational trigonometry, moving from special right triangles to reference angles on the unit circle. This sequence provides scaffolded support for students struggling with geometric interpretations of sine, cosine, and tangent.

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Lenny
2/12
Sequence
Strategy Blueprint Slides
Math Essentials Reference
Math Essentials Reference Updated
Strategy Sandbox Worksheet
Subject Spotlight Activity
Strategy Sandbox Answer Key
Strategy Sandbox 2 Worksheet
Strategy Sandbox 2 Answer Key
Desmos Mastery Slides
Desmos Drill Worksheet
Desmos Drill Answer Key

ACT Math Mastery

A comprehensive ACT Math preparation program focusing on essential strategies, high-yield Algebra and Geometry concepts, and realistic practice to boost scores.

AL

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Other
2/8
Sequence
Inclination Insight Presentation
Inclination Investigation Worksheet
Slope Grid Paper
Teacher Facilitation Guide
Investigation Answer Key

Slope and Symmetry

A specialized unit exploring the geometric properties of slope, connecting algebraic rates of change to trigonometric functions and the geometry of inclination.

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Lenny
1/19
Sequence
Triangle Scaling Worksheet
Triangle Scaling Slides

Unit Circle Blueprint

A comprehensive exploration of the unit circle, bridging geometry and trigonometry by scaling triangles, defining radians, and utilizing symmetry to evaluate trigonometric functions.

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Lenny
1/18
Sequence
Shadow Splitter Slides
Shadow Splitter Worksheet
Shadow Splitter Answer Key

Vector Blueprint

This sequence guides 9th-grade students through the algebraic representation of vectors. Moving from geometric drawings to coordinate components, students use trigonometry and the Pythagorean theorem to decompose, reconstruct, and add vectors with precision.

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Lenny
1/17
Sequence
Vector Launch Teacher Guide
Vector Vision Slides
Directed Dreams Worksheet

Geometric Vector Operations

A comprehensive introduction to vectors through geometric representation, focusing on the distinction between scalars and vectors, visual addition/subtraction, scalar multiplication, and the transition to component form and magnitude calculation.

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Lenny
1/17
Sequence
Triage Intro Slides
Triage Chart Worksheet

Triangle Triage Workshop

A high-level geometry sequence focused on diagnosing oblique triangles. Students use a medical 'triage' theme to master Law of Sines and Law of Cosines through pattern recognition, algebraic mastery, and mixed practice.

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Lenny
1/17
Sequence
Swampy Survey Slides
Formula Forge Worksheet
Formula Forge Answer Key
Beyond Base Teacher Guide

Surveyors Area Toolkit

A comprehensive geometry sequence focused on finding the area of oblique triangles using trigonometric ratios and Heron's Formula, culminating in a real-world land surveying project.

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Lenny
1/17
Sequence
Bearings Briefing Slides
Compass Course Worksheet

Map and Compass Navigational Trig

A 5-lesson geometry project where students apply the Law of Sines and Law of Cosines to solve real-world navigation and surveying problems, culminating in a search-and-rescue triangulation task.

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Lenny
1/17
Sequence
Swinging Gate Slides
Swinging Gate Lab Worksheet

Ambiguous Triangle Case

A comprehensive geometry sequence for 9th-grade students exploring the SSA ambiguous case in trigonometry. Through a mix of visual simulation, algebraic calculation of altitudes, and real-world context, students master why certain geometric constraints lead to zero, one, or two possible triangles.

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Lenny
1/17
Sequence
The Altitude Strategy Worksheet
The Altitude Strategy Slides
The Altitude Strategy Teacher Guide

Triangle Toolkit Mastery

A 5-lesson geometry sequence where students move from right-triangle trigonometry to general triangles. They derive the Law of Sines and Law of Cosines through inquiry and verify their accuracy via a hands-on measurement lab.

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Lenny
1/17
Sequence
Navigation Briefing Slides
Bearing Basics Worksheet
Navigation Teacher Key

Applied Trigonometry in Navigation and Surveying

This sequence explores trigonometry through navigation and surveying. Students learn to use bearings, the Law of Sines, and the Law of Cosines to solve real-world problems involving triangulation, course correction, and indirect measurement.

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Lenny
1/17
Sequence
Compass Course Slides
Bearing Brief Teacher Guide
North Star Worksheet

Navigation and Surveying Trig

This project-based sequence applies general triangle trigonometry to real-world scenarios in navigation, surveying, and aviation. Students move from abstract geometric figures to interpreting word problems involving bearings, headings, and elevation angles, culminating in a simulated search-and-rescue operation.

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Lenny
1/17
Sequence
Oblique Area Slides
Land Survey Worksheet

Blueprints of Reality

This sequence explores the measurement of area and the analysis of forces using general triangles. Students move beyond the basic 1/2 bh formula to discover how sine and perimeter can define area in oblique scenarios, specifically using Heron's Formula and vector analysis.

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Lenny
1/17
Sequence
Stacking Sheets Slides
Base to Bulk Worksheet
Stacking Sheets Teacher Guide

Stacked and Stretched

A comprehensive geometry unit exploring the derivation of volume formulas for prisms and cylinders, anchored in Cavalieri's Principle and the conceptual transition from 2D area to 3D space.

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Lenny
1/17
Sequence
Blueprint Math Worksheet
Floor Plan Deconstruction Slides
Blueprint Math Answer Key

Geometric Optimization and Composite Area Analysis

This 9th-grade sequence challenges students to move beyond basic formulas to analyze the relationship between perimeter and area. Students investigate composite figures, sectors, and regular polygons through the lens of optimization and real-world architectural design.

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Lenny
1/17