Question

a traffic signal board indicating 'school ahead' is an equilateral triangle with side 'a' find the area of the signal bored using 'herons formula if its perimeter is 180 cm what will be the area of the signal bored............
plzzz tell if u know........... it's urgent​

Answer 1

Answer:

Heron's formula is generally used for calculating area of scalene triangle. Hence , the area of the signal board when perimeter is 180 cm is 900√3 cm².

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Answer 2

Answer:

Step-by-step explanation:

Perimeter = 180

3a = 180

a = 60

semi perimeter = 90

Area = √s(s-a)(s-b)(s-c)

        = √90(90-a)(90-a)(90-a)

        = √90(90-a)³

        = (90-a)√90(90-a)

        = (90-60)√90(90-60)

        = 30√(90)(30)

        = 900√3 cm²

You can directly calculate the area of equilateral triangle using the formula  = $\sqrt{3}/4 * a^{2}$   where "a" is the side of the triangle.