6.3Similar Figures
Quick Answer
Two figures are similar (~) if corresponding angles are congruent and corresponding sides are proportional. The ratio of corresponding sides is the scale factor.
Essential Question
What two conditions must hold for two polygons to be similar, and how do you use the scale factor to find missing measurements?
Learning Goals
- 1Define similar polygons.
- 2Identify corresponding angles and sides in similar figures.
- 3Write similarity statements.
- 4Use scale factors to find missing side lengths.
Key Vocabulary
Similar polygons
Polygons with congruent corresponding angles and proportional corresponding sides.
Similarity statement
A statement listing vertices in corresponding order, e.g. △ABC ~ △DEF.
Corresponding parts
Angles or sides that are in the same position in two similar figures.
Full lesson content coming soon
Worked examples, guided practice problems, a workbook, quiz, and downloadable PDF resources will be added to this lesson in Phase 2. The learning goals and vocabulary above reflect the complete lesson scope.