Answer
$a=\frac{\sqrt3}{2}d$
When $d=10$, $a=5\sqrt3$
Work Step by Step
We simplify as follows:
$d=\frac{2a}{\sqrt3}$
$2a=\sqrt3d$
$a=\frac{\sqrt3}{2}d$
Plugging in $d=10$:
$a=\frac{\sqrt3}{2}\times10=5\sqrt3$
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