Question 773711
find the total area of equilateral triangle(pls give me answer in square root formet ).there was a 12 number of equilateral triange which has each base is 2cm.
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Looking at one of the equilatera triangles:::
Draw an altitude (a)
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That forms 2 right triangles.
base = 1 ; side = 2
a = sqrt[1+2^2} = sqrt(5)
Area of the right triangle = (1/2)base*altitude = (1/2)1*sqrt(5)
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Area of the equilateral triangle = sqrt(5)
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Area of the 12 equilateral triangles = 12sqrt(5)
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Cheers
Stan H.
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