SOLUTION: When the sides of an equilateral triangle are 6 inches long, the area of the triangle is approximately 15.6 square inches. What would be the approximate area of an equilateral tria

Question 319610: When the sides of an equilateral triangle are 6 inches long, the area of the triangle is approximately 15.6 square inches. What would be the approximate area of an equilateral triangle whose sides are 12 inches long? (round to the tenth)
Answer by Greenfinch(383) (Show Source): You can put this solution on YOUR website!
If you double the side length, you increase the area by 2 squared or 4
So 4 x 15.6 = 62.4 square inches.
If you want it from first principles, the area is 1/2 x 12 x 12 x sin (60) which is 62.3538 or 62.4 to the nearest tenth.
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