Mathematics, 13.07.2019 23:00 s661103
What is the area of triangle qrs? q(-1 , 2) r(1 , -4) s(-2 , -2)
Answers: 1
![\left[\begin{array}{ccc}-1&2&1\\1&-4&1\\-2&-2&1\end{array}\right]](/tpl/images/0086/4650/0ee4f.png)
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What is the area of triangle qrs? q(-1 , 2) r(1 , -4) s(-2 , -2)...
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