The surface area is basically the area of the surface of the shape. So, if you have a cube, it’s the area of all of the surface of the cube, not anything inside.
We see that we have a net of this square pyramid. If we fold it up, the square and four triangles will make up the surface of the 3D shape we see. So, we need to find the area of all of these shapes.
SQUARE To find the area of a square, you multiply one of the sides by itself (all the sides are the same)
10(10)=100
TRIANGLES To find the area of a triangle, you take the base and multiply the height and then divide it by two.
10(12)=120 120/2=60 Since we have four triangles, we multiply it by four. 60(4)=240
Okay, so in order to find how much she earns per hour you'll take the salary she earns each week ($198.60) and divide that to how many hours she works every week (15 hours). It'll look like: 198.60 / 15= $13.24 per hour.
