# Triangles Question

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## Grade 10 Triangles CCSS: HSG-CO.C.9

- Two angles that add to be [math]180 deg[/math]
- Two angles that have a difference of [math]90 deg[/math]
- Two angles add to be [math]90 deg[/math]
- Two angles that have a difference of [math]180 deg[/math]