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If the height of an equilateral triangle is $$10\sqrt3$$ cm, the area is:
If side of an equilateral triangle is a,then hieght of that triangle$$=a√3/2$$.
so,$$a√3/2=10√3.$$
or,$$a=20.$$
area$$=(1/2)×(a√3/2)×a$$
$$=(1/2)×10√3×20.$$
$$=100√3.$$
Option D is correct choice.
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