Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.
5 it's not a factor of 2058
4/10 x 0.04 = (of means multiply)
0.4 x 0.04 =
0.016
21 because a triangle is always going to equal 180 so add those then subtract and it’s 21
