Common Core · Grade 8
8.G.A.4
Grade 8 — Understand similarity through dilations, and describe a sequence that shows two figures are similar.
The skill that covers it
What a student should be able to do
- Identify similar triangles from angle relationships.
- Write and solve a proportion between corresponding sides, including the side-splitter, midsegment and angle-bisector theorems.
- Use a scale factor to find perimeters and areas.
- Solve indirect measurement problems such as shadow heights.