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Construct an equilateral triangle, given...

Construct an equilateral triangle, given its side and justify the construction.

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Draw a line segment `AB` of length `5.5cm`. taking `5.5cm` radius and `A` as center draw an arc.

Taking `5.5cm` as radius and `B` as center draw another arc.
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Let `C` be the point where the two arcs intersect. Join `AC` and `BC` and label the sides.

Thus, `/_\ABC` is the required equilateral triangle.
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