Right angles can’t be on the outside of the shape, and I don’t think the two angles on the far right can possibly be 90 degrees. They might be like 89.99 degrees for a split second, but never fully 90.
Discussion
Rounding is banned?
Yes. Especially when it comes to geometric shapes. Congruence must be down to the farthest decimal.
I would apply this same critique to the two outside almost right angles as well.
In this realm, zero width lines don't exist. All lines are at least the width of a Planck Length, all points have a minimum volume of the Planck Volume, etc. Practically, lines are typically much wider than these theoretical minimums, which makes finding a true straight line or right angle in nature a rarity.
Which is why geometry operates in the theoretical.
Also not a square then. The angles are infinitesimally curved, it's impossible to detect with the resolution of your iPhone, however. 
I would say, yes, if the corners are rounded, not a square. Probably some leeway with instructions being to operate under the assumption that the lines are straight.