# Monday, May 15

In class topic: ratios between similar figures. If $\dpi{300}\inline a$ and $\dpi{300}\inline b$ are the lengths of two corresponding dimensions between two similar figures, then we can say that all corresponding side lengths will be in the ratio

$\dpi{300}\inline \dfrac{a}{b}$

Their area or surface area ratios will be

$\dpi{300}\inline \left(\dfrac{a}{b}\right)^2 = \dfrac{a^2}{b^2}$

Their volumes will be in the ratio

$\dpi{300}\inline \left(\dfrac{a}{b}\right)^3 = \dfrac{a^3}{b^3}$

Assignment: 11.5 on p. 595: 1-6, 10-17