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?​

Step-by-step explanation:

Heron's formula can be used to find the area of any triangle and is given by:

, where , , and are three sides of the triangle and is the semi-perimeter ().

By definition, all three sides and angles of an equilateral triangle are equal. Therefore, if the total perimeter is 180 cm, each side must have a length of .

The semi-perimeter is therefore:

Substitute values into Heron's formula to get:

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find the lower bound of the range.

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find the upper bound of the range.

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step-by-step explanation:

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.