Where in the world (or at least in the coordinate plane) is the third vertex? Given two coordinate points for the vertices of a triangle, individuals find the location of the third vertex. They read an account of fictional classmates attempting the task to consider different solution methods.

Concepts

triangles, vertices, area of triangles, coordinate plane

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Additional Tags

math

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Instructional Ideas

• Challenge learners to find as many triangles as possible that fit the criteria

Classroom Considerations

• Pupils should already know how to find the area of a triangle
• Provide the class with graph paper to work out solutions

Pros

• Provides optional related tasks for different grade levels
• Allows for different ways to conduct the activity

Cons

• None

Common Core

6.G.A.1 6.G.A.3 7.G.B.6 MP1 MP6 MP8