Please help i will gove you brainliest if you show explanation

Its in there

Step-by-step explanation:

To find the surface area of a regular triangular pyramid, we use the formula SA = A + (3/2)base height, where A = the area of the pyramid's base, b = the base of one of the faces, and h = height of one of the faces

To find the surface area of a regular triangular pyramid, we use the formula SA = A + (3/2)base height, where A = the area of the pyramid's base, b = the base of one of the faces, and h = height of one of the faces

Step-by-step explanation:

i know because i just did this

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step-by-step explanation:

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