Question

find the area of equilateral triangle if its perimeter is 9 CM​

Answer 1

Answer:

Δ=9/4 cm²

Step-by-step explanation:

perimeter= 9 cm

each side=3 cm     [9/3=3]

area of equilateral triangle =√3/4 a²

where a is the side's length

Δ=√3/4×3×3

  =9/4 cm²

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