Answer:
18617.66 ft^2
Explanation:
sides of triangular base
a= 145ft ,
b = 257ft ,
c = 290ft
calculate the area of the base
The base is a scalene triangle hence the area is calculated as follows
s = ( a + b + c ) / 2
= ( 145 + 257 + 290 ) / 2 = 346
Area of triangle =
![√(s(s-a)(s-b)(s-c)) = √(346(201)(89)(56))](https://img.qammunity.org/2022/formulas/mathematics/high-school/p6xxcirns23z6ja63ski7rmen31gwl4yq0.png)
= 18617.66 ft^2