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shriyasoni150
23.06.2019 •
Mathematics
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Ответ:
Part A:
The length of segment DE is √(17)
The length of segment DF is √(17)
The length of segment EF is 3·√2
Part B:
The slope of segment DE is 4
The slope of segment DF is 1/4
The slope of segment EF is -1
Part C:
The triangle is an isosceles triangle
Step-by-step explanation:
Part A:
The vertices of the triangle ΔDEF are given as follows;
D(2, 1), E(3, 5), and F(6, 2)
The equation for the length of a segment, l, is given as follows;
The length of segment DE is![l_{DE} = \sqrt{\left (5-1 \right )^{2}+\left (3-2 \right )^{2}} = \sqrt{17}](/tpl/images/0718/2824/34da0.png)
The length of segment DF is![l_{DF} = \sqrt{\left (2-1 \right )^{2}+\left (6-2 \right )^{2}} = \sqrt{17}](/tpl/images/0718/2824/030fa.png)
The length of segment EF is![l_{EF} = \sqrt{\left (2-5 \right )^{2}+\left (6-3 \right )^{2}} = 3 \cdot \sqrt{2}](/tpl/images/0718/2824/743ad.png)
Part B:
The slope of a segment, m, is given by the following relation;
The slope of segment DE is given as follows;
The slope of segment DF is given as follows;
The slope of segment EF is given as follows;
Part C:
The triangle is an isosceles triangle because it has two sides that are equal.