Question 773711
From your problem description, I understand that you have an equilateral triangle with each side equal to 2 cm.
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we need to find the altitude of the triangle.  We use the theorem of Pythagoras,
1^2 + x^2 = 2^2
1 + x^2 = 4
x = square root(3)
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A = 1/2 *2 *square root(3)
A = square root(3) cm's