To find the area,we can use Heron’s formula:
[tex]s = \frac{perimeter \: or \: (a + b + c)}{2 } \\ area = \sqrt{s(s - a)(s - b)(s - c)} [/tex]
*Heron’s formula is a formula that use the 3 sides of triangle to find the area.
In this case:
s=30/2
s=15
The length of the triangle:
30÷3
=10ft
The area:
=_/15(10-15)(10-15)(10-15)
=_/15(5)(5)(5)
=_/1875
=43
=25_/3 sq.ft
Therefore the answer is B.
Hope it helps!
