span class="intersentencespace"></span> You can add, subtract, multiply, and divide rational numbers, and the result will always be a rational number.<span class="intersentencespace"></span> However, even the rationals are not enough for all of math!</p>
<p>In geometry, we can obtain <em>irrational</em> quantities like <span class="inline_math">\( \sqrt{2} \)</span> (the diagonal of a square with side 1)
and <span class="inline_math">\( \pi \)</span> (the ratio between a circle’s circumference and its dia