Question

One side of an equilateral triangle is 11 1/5 cm. What is the perimeter of the triangle?
Express your answer as a decimal.

Answer 1

Answer:

perimeter=sum of the sides

11 1/5+ 11 1/5+ 11 1/5=168/5

168/5= 33.6

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Answer 2

Given the side of equilateral triangle is 30 cm

Then area of equilateral triangle=

4

3

(30)

2

=

4

3

×900=225

2

cm

2