For this case we have that by definition, the area of a triangle is given by:
[tex]A = \frac {b * h} {2}[/tex]
Where:
b: It is the base of the triangle
h: It's the height of the triangle
In the figure two triangles are shown, inverted among themselves.
[tex]A_ {1} = \frac {4 * 20} {2} = 40 \ ft ^ 2\\A_ {2} = \frac {4 * 10} {2} = 20 \ ft ^ 2[/tex]
Thus, the total area is:
[tex]A_ {t} = 40 \ ft ^ 2 + 20 \ ft ^ 2\\A {t} = 60 \ ft ^ 2[/tex]
Answer:
[tex]60 \ ft ^ 2[/tex]
