What is the surface area of the triangular prism? 5 ft
4 ft
9 ft
6 ft
__square feet

168 ft.sq

Step-by-step explanation:

To calculate the surface area of this triangular prism we must break it into pieces :

Let's start with the triangles :

Let A be the area of one triangle :

No need to calculate the area of each rectangle, we can multiply the sides of the triangle by the height :

we need the lenght of the third side

Let d be the third side :

So the surface area Sa is :

Sa= 2A+ 9*(6+5+5) = 24 + 9*16 = 168 ft.sq

25.2

step-by-step explanation:

2+4x6-8/10= 25.2