a traffic signal board indicating School ahead is an equilateral triangle with side 'a' find the area of the signal board using heron's formula . if its perimeter is 180 cm what will be the area of the signal board ??
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Answered by
6
Let 2s be the perimeter of of the signal board. Then,
Let △ be the area of the given equilateral triangle. Then,
△ =
△ =
△ = = =
if perimeter = 108 cm Then,
2s = 108
3a = 108
a = 60
△ =
=
Answered by
22
Given,
Side of the signal board = a
Perimeter of the signal board = 3a = 180 cm
∴ a = 60 cm
Semi perimeter of the signal board (s) = 3a/2
By using Heron’s formula,
Area of the triangular signal board will be =(in the above attachment)
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