To find the surface area of the triangular prism, you can find the sum of the areas of two triangles and three rectangles, or you can find the sum of the areas of one rectangle and one trapezoid. Show that the surface area is the same using either method.

-9

step-by-step explanation:

4.5%

step-by-step explanation:

what’s the question?

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110