- CCSS High School: Geometry (Similarity, Right T, Trig.)
- HSG.SRT.A.1, 1A, 1B: Exploring Dilations
- HSG.SRT.A.2: Proving Figures Similar
- HSG.SRT.A.3: AA~ Theorem
- HSG.SRT.B.4 - 5: Prove theorems involving similarity
- HSG.SRT.C.6, 7, 8: Right triangle trigonometry
- HSG.SRT.D.9, 10, 11: Apply trigonometry to general triangles
- Links to Other CCSS High School: Geometry Standards
- Additional - Links to CCSS High School: Functions Resources

# CCSS High School: Geometry (Similarity, Right T, Trig.)

- Author:
- Tim Brzezinski

- Topic:
- Cosine, Geometry, Right Triangles, Sine

**This GeoGebra Book contains lots of discovery-based learning activities, investigations, and meaningful remediation worksheets that were designed to help enhance students' learning of geometry concepts both inside and outside of the mathematics classroom. This GeoGebra Book also contains contributions from the following individuals: Jennifer Silverman (https://www.geogebra.org/jennifer+silverman) Steve Phelps (https://www.geogebra.org/stevephelps) Dr. Ted Coe (https://www.geogebra.org/tedcoe) Without their amazing talent and creativity, this resource would not have been possible.**

## Table of Contents

### HSG.SRT.A.1, 1A, 1B: Exploring Dilations

### HSG.SRT.A.2: Proving Figures Similar

### HSG.SRT.A.3: AA~ Theorem

### HSG.SRT.B.4 - 5: Prove theorems involving similarity

- SAS ~ Theorem
- SSS ~ Theorem (V1)
- Animation 63
- SSS ~ Theorem (V2)
- SSSS: Similar Quads?
- Similar Right Triangles (V1)
- Similar Right Triangles (V2)
- Animation 13
- Pythagorean and similar triangles.
- Effortless Trisections
- Animation 134
- Parallel Lines Congruent Segments Theorem
- Parallel Lines Proportionality Theorem
- Triangle-Angle Bisector Theorem
- Animation 81
- Scaling Figures: Effects on Areas
- Proof Without Words
- Wordless Pythagorean Theorem based on Translations
- Proof Without Words
- Proof Without Words
- Proof Without Words
- Proof Without Words
- Proof Without Words
- Proof Without Words
- Proof Without Words
- Proof Without Words
- Proof Without Words

### HSG.SRT.C.6, 7, 8: Right triangle trigonometry

- Quiz: Pythagorean Theorem (1)
- Quiz: Pythagorean Theorem (2A)
- Quiz: Pythagorean Theorem (2B)
- Right Triangles: Identifying Sides WRT Acute Angles
- Identifying Trig Ratios: Quick Formative Assessment
- Finding Exact Trig Ratios: Quiz Question Generator
- Finding Acute Angles of Right Triangles: Using Inverse Trig Functions (Quiz)
- Angles in Standard Position
- Animation 176
- Does R Matter?
- Quiz: Evaluating Trigonometric Functions of Angles Given a Point on its Terminal Ray
- Evaluating Trigonometric Functions of an Angle Given a Point on its Terminal Ray
- Trig Ratio Possibilities?
- Right Triangle Trigonometry: Solving for Sides (Quiz)
- Quiz: Right Triangle Trig (Solving for Sides)
- Special Right Triangles: Basic Questions
- Quiz: Special Right Triangles
- Special Angles in Standard Position: Intro (V2)
- Special Angles in Standard Position: Intro (V3)
- Special Angles in Standard Position: Intro (V1)
- Animation 177
- Animation 178
- Right Triangle Generator: Plot 2 Points and Enter an Acute Angle
- Right Triangle Trigonometry: Intro
- Conceptual Illustrations: Trigonometric Ratios within Right Triangles
- Trig Ratio Estimations (Right Triangle Context)
- Trig Ratio Estimations (Quiz: V1)
- Trig Ratio Estimations (Quiz: V2)
- Trigonometric Ratios (Right Triangle Context)
- Right Triangle Solver: Formative Assessment
- Discovering Sine, Cosine, and Tangent in Right Triangles
- Special Trigonometric Identities: Quick Exploration
- What "CO" in COsine Means
- Quiz: Expressing Angles Using Inverse Trigonometric Function
- Animation 98
- Animation 99
- Animation 100
- YOUR Linear Speed?
- How Fast are You Spinning?

### HSG.SRT.D.9, 10, 11: Apply trigonometry to general triangles

### Links to Other CCSS High School: Geometry Standards

### Additional - Links to CCSS High School: Functions Resources