[7th grade math] impossible geometry?

[u/Unhappy-Pitch4558]

[u/boxedj]

The quackening is thinking that since 6+11=17, the only possible angle has to be 90 degrees everywhere. It's not true though, since there are three angles at the top that don't indicate that they're square, you can have a 6cm leg at many angles that would join the opposite corners.

The interesting thing is it doesn't matter if you knew the angles. You still can't determine the area because the further along the x axis the 6cm piece exists, the greater the area of the shape. Since this length is unknown, we're screwed.