Scaling and similar figures

Enlarging a shape by a factor multiplies every length by that factor, the area by the factor squared, and the volume by the factor cubed. Almost every mistake here is applying the length factor to an area or a volume.

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Work through it

LearnWhat it is, how to spot it, a worked example, and where it goes wrong.
Practice — 3-point ladderNo problems written at this tier yet.Nothing written at this tier yet
Practice — 4-point ladder4 problems. Three in a row finishes it.0/3 in a row · 0/4 solved
Practice — 5-point ladderNo problems written at this tier yet.Nothing written at this tier yet
Skill quizFinish every ladder that has problems first.Finish the ladders above first

Before and after

Needs first

GEO-01Perimeter and area of rectilinear shapes NUM-11Ratio as parts of a whole

Opens up

Nothing yet. No other skill in the Atlas lists this one as a prerequisite.

In official papers

No indexed official paper question has been tagged with GEO-16 yet. The index grows one paper at a time, and it records only question numbers, point values and our own skill tags — never the problems themselves.

See the papers indexed so far

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