The roof on a shed is a square-based pyramid. if the base has a side length of 10 feet and the slant length of the root is 9.4 feet, find the area of the roof.

We know that 

[the area of the root]=4*[area of one lateral triangle side]

area of one lateral triangle side=b*h/2
b=10 ft
h=9.4 ft
area of one lateral triangle side=10*9.4/2> 47 ft²

[the area of the root]=4*[47]> 188 ft²

the answer is
the area of the root is 188 ft²

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.