Ron used 121 congruent equilateral triangles with 2 cm side lengths to form one large equilateral triangle. What is the perimeter of the large triangle?

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asked Nov 5, 2019 65.8k views

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AlexAndro · Answer 1 · 2019-11-11T17:54:22+0000

The number of smaller triangles along one side of the larger triangle is the square root of the total number of triangles. The perimeter of the large triangle is ...
3*(2 cm)*√121 = 66 cm

Ron used 121 congruent equilateral triangles with 2 cm side lengths to form one large equilateral triangle. What is the perimeter of the large triangle?

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