26 Testing phantom
[latexpage]
\(\begin{array}{ccccccc}{\text{front}}=L\timesW\hfill & & & {\text{side}}=L\timesW\hfill & & & {\text{top}}=L\timesW\hfill \\ {\text{front}}=4\cdot3\hfill & & & {\text{side}}=2\cdot3\hfill & & & {\text{top}}=4\cdot2\hfill \\ {\text{front}}=12\hfill & & & {\text{side}}=6\hfill & & & {\text{top}}=8\hfill \end{array}\)
\(\begin{array}{ccccccc}{A}_{\text{front}}=L\timesW\hfill & & & {A}_{\text{side}}=L\timesW\hfill & & & {A}_{\text{top}}=L\timesW\hfill \\ {A}_{\text{front}}=4\cdot3\hfill & & & {A}_{\text{side}}=2\cdot3\hfill & & & {A}_{\text{top}}=4\cdot2\hfill \\ {A}_{\text{front}}=12\hfill & & & {A}_{\text{side}}=6\hfill & & & {A}_{\text{top}}=8\hfill \end{array}\)
\(96°\)°
\(1\)\(1\phantom{\rule{1.5em}{0ex}}\)
\(2\)\(2\phantom{\rule{1.5em}{0ex}}\)
\(3\)\(3\phantom{\rule{1.5em}{0ex}}\)
\(a\)\(a\phantom{\rule{1.5em}{0ex}}\)
•·
The expressions < \(a<b \text{ and } a\phantom{\rule{0.2em}{0ex}}\) > \(b{\rule{0.2em}{0ex}}\)
\(and \text{ and}\) \(\text{and} \phantom{\rule{0.2em}{0ex}}\)
The expressions \(a<b\phantom{\rule{0.2em}{0ex}}\text{and}\phantom{\rule{0.2em}{0ex}}a\) > \(\phantom{\rule{0.2em}{0ex}}b\) can be read from left-to-right or right-to-left, though in English we usually read from left-to-right. In general,
\(\begin{array}{l}a<b\phantom{\rule{0.2em}{0ex}}\text{is equivalent to}\phantom{\rule{0.2em}{0ex}}b>a.\phantom{\rule{2em}{0ex}}\text{For example,}\phantom{\rule{0.2em}{0ex}}7<11\phantom{\rule{0.2em}{0ex}}\text{is equivalent to}\phantom{\rule{0.2em}{0ex}}11>7.\hfill \\ a>b\phantom{\rule{0.2em}{0ex}}\text{is equivalent to}\phantom{\rule{0.2em}{0ex}}b<a.\phantom{\rule{2em}{0ex}}\text{For example,}\phantom{\rule{0.2em}{0ex}}17>4\phantom{\rule{0.2em}{0ex}}\text{is equivalent to}\phantom{\rule{0.2em}{0ex}}4<17.\hfill \end{array}\)
\(\begin{array}{l}a<b\phantom{\rule{0.2em}{0ex}}\text{is equivalent to}\phantom{\rule{0.2em}{0ex}}b>a.\phantom{\rule{2em}{0ex}}\text{For example,}\phantom{\rule{0.2em}{0ex}}7<11\phantom{\rule{0.2em}{0ex}}\text{is equivalent to}\phantom{\rule{0.2em}{0ex}}11>7.\hfill \\ a>b\phantom{\rule{0.2em}{0ex}}\text{is equivalent to}\phantom{\rule{0.2em}{0ex}}b<a.\phantom{\rule{2em}{0ex}}\text{For example,}\phantom{\rule{0.2em}{0ex}}17>4\phantom{\rule{0.2em}{0ex}}\text{is equivalent to}\phantom{\rule{0.2em}{0ex}}4<17.\hfill \end{array}\)
