$ABC$ is an isosceles triangle . If the co-ordinates of the base are $(1, 3)$ and $(- 2, 7) $, then co-ordinates of vertex $A$ can be :
$ABC$ is an isosceles triangle . If the co-ordinates of the base are $(1, 3)$ and $(- 2, 7) $, then co-ordinates of vertex $A$ can be :
- A
$\left( { - \,{\textstyle{1 \over 2}}\,\,,\,\,5} \right)$
- B
$\left( { - \,{\textstyle{1 \over 8}}\,\,,\,\,5} \right)$
- C
$\left( {{\textstyle{5 \over 6}}\,\,,\,\, - \,5} \right)$
- D
$\left( { - \,7\,\,,\,\,{\textstyle{1 \over 8}}} \right)$
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