# Similarity, Right Triangles, & Trigonometry

• Understand Similarity In Terms Of Similarity Transformations
• G.SRT.1
Verify experimentally the properties...
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• G.SRT.1.a
A dilation takes a line not passing ...
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• G.SRT.1.b
The dilation of a line segment is lo...
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• G.SRT.2
Given two figures, use the definitio...
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• G.SRT.3
Use the properties of similarity tra...
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• Prove Theorems Involving Similarity
• G.SRT.4
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• G.SRT.5
Use congruence and similarity criter...
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• Define Trigonometric Ratios And Solve Problems Involving Right Triangles
• G.SRT.6
Understand that by similarity, side ...
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• G.SRT.7
Explain and use the relationship bet...
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• G.SRT.8
Use trigonometric ratios and the Pyt...
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• Apply Trigonometry To General Triangles
• G.SRT.9
(+) Derive the formula A = 1/2 ab si...
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• G.SRT.10
(+) Prove the Laws of Sines and Cosi...
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• G.SRT.11
(+) Understand and apply the Law of ...
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• K-2
• 3-5
• 6-8
• 9-12
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### Self-Check Quizzes-Similar Triangles (Glencoe)

Solve problems involving similar triangles in this short quiz.

### Similarity

Can you tell if triangles are similar? Learn about triangle similarity and test yourself.

### Similar Triangles

Explore different ways of determining if triangles are similar by using transformations.

### Triangle Similarity Test - Three Sides in Proportion (SSS)

Learn how to use the triangle similarity test to determine triangle similarity.

### Find Missing Sides and Angles of Similar Triangles

Watch this collection of videos learn how to find missing sides and angles of similar triangles.

### Congruent and Similar Shapes Quiz: Test Bite (BBC)

Test your knowledge of congruent and similar shapes.

### Similar Triangles

Watch this video to learn how to calculate the missing side of a similar triangle using ratios.

### The Law of Sines

In this visual proof, understand how the Law of Sines is used in trigonometry.

### The Law of Cosines

Understanding the Law of Cosines will open the world of trigonometry to you with this visualization.

### Three Similar Triangles: What Is It About?

Explore a proof for similar triangles.

### Self-Check Quizzes-Similar Triangles (Glencoe)

Solve problems involving similar triangles in this short quiz.

### Solving Acute, and Obtuse Triangles Using Law of Sines, and Law of Cosines.

Work through problems using the Law of Sines and the Law of Cosines.

### Hotmath Practice Problems

Solve general triangles using the Law of Sines and Law of Cosines.

### Statics Trig: Law of Cosines

Apply the Law of Cosines to finding resultant forces in this interactive physics tutorial.

### Similarity in a Right Triangle: Similar Triangles Inside a Right Triangle with an Altitude from the Right Angle.

Visualize how drawing from the right angle of a right triangle creates three similar triangles.

### Similar Triangles - Ratio of Areas

Explore similar triangles and proportionality of side lengths and areas.

### Similar Triangles - Ratios of Parts

Observe how the parts of similar triangles are always in proportion to one another.

### Triangle Similarity Test - Two Sides and Included Angle (SAS)

Learn how to use SAS (side-angle-side) to determine triangle similarity.

### Similarity

Can you tell if triangles are similar? Learn about triangle similarity and test yourself.

### Similar Triangles

Explore different ways of determining if triangles are similar by using transformations.

### Triangle Similarity Test - Three Sides in Proportion (SSS)

Learn how to use the triangle similarity test to determine triangle similarity.

### Proof: Similar Triangles 2

Create a two-column proof involving the similar triangle side-splitter theorem.

### Proof: Similar Triangles 3

In this activity, create a two-column proof involving similar triangles.

### Proof: Similar Triangles 4

Create a two-column proof involving the similar triangle side-splitter theorem.

### Using Similar Triangles

In this destination find the missing side lengths in similar triangles.

### Similar Triangles (Annenberg)

Estimate the heights of trees, flagpoles, buildings, and more by using similarity and shadows.

### Trigonometry Ratios in Right Triangles

Explore the trigonometric ratios or sine, cosine and tangent with this interactive right triangle.

### Angles of Elevation and Depression in Right Trigonometry with Sine, Cosine, and Tangent Ratios.

Use the trig ratios to solve word problems involving right triangles.

### Solving Right Triangle Problems

Play a matching game, watch a lesson and solve right triangles in this multi-layered activity.

### The Trigonometric Ratios (Pearson)

How fast can you find the values of trigonometric ratios? Find out by playing this game.

### Discovering the Trig Ratios

Where do sine, cosine and tangent come from? Find out for yourself with this activity and applet.

### Find Missing Sides and Angles of Similar Triangles

Watch this collection of videos learn how to find missing sides and angles of similar triangles.

### Congruent and Similar Shapes Quiz: Test Bite (BBC)

Test your knowledge of congruent and similar shapes.

### Similar Triangles

Watch this video to learn how to calculate the missing side of a similar triangle using ratios.

### The Law of Sines

In this visual proof, understand how the Law of Sines is used in trigonometry.

### The Law of Cosines

Understanding the Law of Cosines will open the world of trigonometry to you with this visualization.

### Three Similar Triangles: What Is It About?

Explore a proof for similar triangles.

### Self-Check Quizzes-Similar Triangles (Glencoe)

Solve problems involving similar triangles in this short quiz.

### Solving Acute, and Obtuse Triangles Using Law of Sines, and Law of Cosines.

Work through problems using the Law of Sines and the Law of Cosines.

### Hotmath Practice Problems

Solve general triangles using the Law of Sines and Law of Cosines.

### Statics Trig: Law of Cosines

Apply the Law of Cosines to finding resultant forces in this interactive physics tutorial.

### Similarity in a Right Triangle: Similar Triangles Inside a Right Triangle with an Altitude from the Right Angle.

Visualize how drawing from the right angle of a right triangle creates three similar triangles.

### Similar Triangles - Ratio of Areas

Explore similar triangles and proportionality of side lengths and areas.

### Similar Triangles - Ratios of Parts

Observe how the parts of similar triangles are always in proportion to one another.

### Triangle Similarity Test - Two Sides and Included Angle (SAS)

Learn how to use SAS (side-angle-side) to determine triangle similarity.

### Similarity

Can you tell if triangles are similar? Learn about triangle similarity and test yourself.

### Similar Triangles

Explore different ways of determining if triangles are similar by using transformations.

### Triangle Similarity Test - Three Sides in Proportion (SSS)

Learn how to use the triangle similarity test to determine triangle similarity.

### Proof: Similar Triangles 2

Create a two-column proof involving the similar triangle side-splitter theorem.

### Proof: Similar Triangles 3

In this activity, create a two-column proof involving similar triangles.

### Proof: Similar Triangles 4

Create a two-column proof involving the similar triangle side-splitter theorem.

### Using Similar Triangles

In this destination find the missing side lengths in similar triangles.

### Similar Triangles (Annenberg)

Estimate the heights of trees, flagpoles, buildings, and more by using similarity and shadows.

### Trigonometry Ratios in Right Triangles

Explore the trigonometric ratios or sine, cosine and tangent with this interactive right triangle.

### Angles of Elevation and Depression in Right Trigonometry with Sine, Cosine, and Tangent Ratios.

Use the trig ratios to solve word problems involving right triangles.

### Solving Right Triangle Problems

Play a matching game, watch a lesson and solve right triangles in this multi-layered activity.

### The Trigonometric Ratios (Pearson)

How fast can you find the values of trigonometric ratios? Find out by playing this game.

### Discovering the Trig Ratios

Where do sine, cosine and tangent come from? Find out for yourself with this activity and applet.

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