Two figures<span> that have the same shape are said to be </span>similar<span>. When two </span>figures<span> are </span>similar<span>, the ratios of the lengths of their corresponding sides are equal. We calculate as follows:
3.9 / 1.3 = 9.6 / b b = 9.6 x 1.3 / 3.9 b = 3.2</span>
take the log of both sides
or