A 331 degree angle is a reflex angle and it nearly looks like a circle because there are 360 degrees in a circle.
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Since a full circle is 360°, a 331° angle is the outside measure of a 29° angle.
Since the angle of 331⁰ is in the fourth quadrant, then the measure of its reference angle in the first quadrant is 360⁰ - 331⁰ = 29⁰ .
It's hard to say, because there are so many possibilities.-- If it's in the shape of a circle, then the diameter of the circle is 15.2 inches.-- If it's in the shape of a square, then each side of the square is 13.4 inches.-- If it's in the shape of a rectangle that's not square, then there are aninfinite number of possibilities. Here are a few of them:1" x 180"1.5 x 1202 x 902.4 x 752.5 x 723 x 603.6 x 504 x 454.5 x 404.8 x 371/25 x 365.4 x 331/36 x 307.2 x 257.5 x 248 x 22 1/28.1 x 222/99 x 209.6 x 18 3/49.9 x 18 2/1110 x 1812 x 15The only thing we know for sure is that whatever shape it's in, it hasan area of exactly 180 square inches. And it turns out that this is thebest way to describe how big it is.