Question 1109236
*[illustration tr1.png].
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From the diagram,
{{{H^2+s^2=(2s)^2}}}
{{{H^2+s^2=4s^2}}}
{{{H^2=3s^2}}}
{{{H=sqrt(3)s}}}
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From there,
{{{A=(1/2)(2s)(H)}}}
Work that out for the area of the triangle.