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Lesson Plans and Worksheets for Grade 8

Lesson Plans and Worksheets for all Grades

More Lessons for Grade 8

Common Core For Grade 8

### New York State Common Core Math Grade 8, Module 3, Lesson 10

### Lesson 10 Student Outcomes

### Lesson 10 Summary

### NYS Math Module 3 Grade 8 Lesson 10

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

Lesson Plans and Worksheets for Grade 8

Lesson Plans and Worksheets for all Grades

More Lessons for Grade 8

Common Core For Grade 8

Examples, videos, and solutions to help Grade 8 students learn an informal proof of the Angle-Angle (AA) criterion for similar triangles and present informal arguments as to whether or not triangles are similar based on Angle-Angle criterion.

Download Worksheets for Grade 8, Module 3, Lesson 10

• Students know an informal proof of the Angle-Angle (AA) criterion for similar triangles.

• Students present informal arguments as to whether or not triangles are similar based on Angle-Angle criterion.

• Two triangles are said to be similar if they have two pairs of corresponding angles that are equal.

Classwork

Concept Development

Exercises

1. Use a protractor to draw a pair of triangles with two pairs of equal angles. Then measure the lengths of sides, and
verify that the lengths of their corresponding sides are equal in ratio.

2. Draw a new pair of triangles with two pairs of equal angles. Then measure the lengths of sides, and verify that the
lengths of their corresponding sides are equal in ratio.

Example 1 - 3

Are the triangles shown below similar? Present an informal argument as to why they are or why they are not.

Exercises 3 - 5

Are the triangles shown below similar? Present an informal argument as to why they are or why they are not.

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You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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