A signboard is in the shape of an equilateral triangle with side 'a'. Find the area of the signboard. If the perimeter of the board is 210cm, what its area.
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Answer : 1225√3
Step-by-step explanation:
Perimeter = 210 cm
Side = a = 210/3 (triangle have three side so divided by three)
Area of triangle = √3a^2 /4
a = 70 cm
4900√3/4 =1225√3
chardpu:
can u be more specific....i mean in detail.
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