Respuesta :

Given:

Base b= 18ft

Height h = 4 ft

The area of the triangle = 1/2 bh

[tex]\begin{gathered} A=\frac{1}{2}\times18\times4 \\ =9\times4 \\ =36ft^2 \end{gathered}[/tex]

Hence, the required answer is 36 ft^2.