Find the total surface area of this square based
pyramid.
10 in
5 in

  125 in²

Step-by-step explanation:

Each triangular face has a base of 5 in and a height of 10 in. The area of it is given by the formula ...

  A = (1/2)bh

  A = (1/2)(5 in)(10 in) = 25 in²

The square base has an area given by the formula ...

  A = s² . . . . . where s is the side length

  A = (5 in)² = 25 in²

The total area is the sum of the areas of the 4 faces and the base:

  total area = 4 × (area of 1 face) + (area of base)

  total area = 4 × (25 in²) + 25 in²

  total area = 125 in²

128.08

Step-by-step explanation:

To find the surface area use the expression

When you plug in 5 for a and 10 for h you will get 128.08

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

i believe that the answer is

b. y-1=-2(x-4)

hope this !