Common Core · Grade 7
7.G.A.2
Grade 7 — Draw triangles from three given measures and notice when they determine one triangle, many, or none.
A note on this mapping: The triangle inequality is not a Common Core standard by name; 7.G.A.2 is where "can these three lengths make a triangle?" is actually asked.
The skill that covers it
What a student should be able to do
- Classify triangles by sides and by angles.
- Find a missing angle using the 180-degree angle sum.
- Apply the exterior angle theorem.
- Decide whether three lengths can form a triangle.