Tag

Scale

Entries tagged scale.

2 entries

Congruence and similarity

Two figures are congruent when one can be placed exactly on the other by moving it without stretching, and similar when one is an exact scaled copy of the other, same shape, possibly different size.

7 min

Mental model

Estimation and orders of magnitude

An order-of-magnitude estimate breaks an unknown quantity into a chain of roughly known factors, so that the errors in each factor partially cancel and the product lands within a defensible range of the truth.

7 min