Ratios with Similar Triangles

Students investigate similar right triangles by measuring side lengths and calculating ratios, discovering that equal-angle triangles have proportional sides (consistent ratios), then extend the finding with tables and graphs and a height/shadow application.

Data and Resources

Additional Info

Field Value
Subject Area Mathematics
Grade Band 6-8
Technology Tool CODAP
Class Time Estimate 3
Data Science Focus
  • 6-8.D.2.1a Ask or identify a question that can be verified with data collected through observations.
  • 6-8.D.2.1b State a guess or potential answer to a question for later verification or testing via a hypothesis.
Standards Alignment
  • 6.RP.A.3
  • 7.G.A.1
  • 7.RP.A.2
  • 8.G.A.1
Prerequisites Forming and interpreting ratios; equivalent ratios / basic proportional reasoning; multiplication and division with decimals.
Version 1.0
Date Created July 8, 2026
Last Updated July 8, 2026