Find an unknown side length given the perimeter

G3.MD.18Grade 3MeasurementSource mission: Perimeter

Works backward from a known perimeter and some side lengths to find a missing one.

Progress & proof summary

LifecycleNot started

Evidence progress0 of 1 pieces collected

Current predictionNo prediction yet

Next reviewNot scheduled

Mastery projection: Not available yetWhat does this mean?

3.MD.D.8

subtracts the known side once from the perimeter without accounting for the opposite side

These evidence lanes define what would count toward this atom.

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Apply the idea

Works backward from a known perimeter and some side lengths to find a missing one.

Estimated time: ~5 min