The least number of socks that rob can remove to guarantee he removed a pair of white socks without looking is15 socks
Cross section is a surface that is exposed after slicing or making a cut through an object. If a hexagonal pyramid is cut horizontally then the cross section should be an hexagon as well since the base is a hexagon. However, when it is cut vertically the resulting shape would be a triangle.
The perimeter of the rectangle is all the side lengths added up
Perimeter = 5 + 10 + 5 + 10 = 30
Hope that helps!
