stretching& shrinking

Mr. Drucker, Dec 4, 2014


  • 1. Angle-Angle Similarity Exploration
  • 2. Similar Triangles Check for Understanding
  • 3. Similar Triangles
  • 4. Are they similar? (3)
  • 5. Are they similar? (2)
  • 6. Missing lengths in similar triangles
  • 7. Properties of Similar Triangles
  • 8. Perimeter Scale Factor vs Area Scale Factor
  • 9. Perimeter and Area Ratio for different scale factors
  • 10. Perimeter and area of rectangles

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Angle-Angle Similarity Exploration

Input two angle measures for the triangles below. Toggle the check boxes and determine if the two triangles are similar.

Questions: 1. What must be true about the third angle measures in both these triangles? What theorem gaurantees this is true? 2. When two pairs of corresponding angles are congruent what is true about their corresponding sides? Is this always true? 3. Create two similar triangles with new angle measures. Check the box show sides. Can you determine the scale ratio (scale factor)? 4. Can you use this scale ratio and find the length of FD? Check your work by checking the box "Show FD"
– Anthony DiLaura

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