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Standards

HSG‑CO.C.9 Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a...
HSG‑CO.C.10 Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum...
HSG‑CO.C.11 Prove theorems about parallelograms. Theorems include: opposite sides are congruent, opposite...