Knowledge atom
Recognize area as additive
Knows the area of a figure equals the sum of the areas of its non-overlapping parts.
Start practiceProgress & proof summary
LifecycleNot started
Evidence progress0 of 1 pieces collected
0%Current predictionNo prediction yet
Why?Next reviewNot scheduled
Mastery projection: Not available yetWhat does this mean?
Standards alignment
3.MD.C.7d
Prerequisites
Common misconceptions
- double counts the shared boundary region
Required evidence
These evidence lanes define what would count toward this atom.
EvidencePerformanceStatusNext step
Explain the ideaDescribe why the response works Not startedCollect one observation
Recent evidence
No evidence recorded yet
The first response record for this atom will appear here.