In the model, a hundreds grid represents a whole. Which decimal is represented by the shaded portion of the model?

0.3
0.7
1.3
1.7
It’s super hard

Im pretty sure it’s the first one

I'm a bit puzzled here because they did not provide you with any measures of the other angles, so i am unable to provide a theorem or postulate to support my answer, but i'd say 90 degrees because it looks closer to a right angle than anything.