Equilateral 37341

Calculate the perimeter and the area of an equilateral triangle with a side 20 dm

Correct answer:

o =  60 dm
S =  173.2051 dm2

Step-by-step explanation:

a=20 dm o=3 a=3 20=60 dm
S=43 a2=43 202=100 3=173.2051 dm2

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