<p>Hey. I just received my Dr. John Chung’s SAT Math book today and I was a little confused on page 9. On number 3 it shows two similar triangles with bases 2 and 5 and the book compares the area by squaring both. Does this work with all similar shapes? I was confused because the area of a triangle is (1/2)bh but, somehow the book solves it by squaring both bases to find the ratio of areas.</p>
<p>yes, it applies to all shapes. it is the short cut to find ratio of areas by squaring the lengths provided at the question.</p>
<p>If I was given two circles, and given the circumference, can I also square that to find the ratio?</p>