Question

Two regular octagons have sides of lengths 21 and 28, respectively. Find (a) the scale factor, (b) the ratio of the perimeters, and (c) the ratio of the areas of the octagons.

Answer 1

\[21k=28\]
\(k\) is the scale factor.

Answer 2

^The scale factor could also be given by
\[21=28r\]
since the factor could be any real number.

8 sides to an octagon, so the perimeter is 8 times the side length.