Question 814728
width | 12
area | 18 sqrt(77)=157.949
perimeter | 66
interior angles | ((180 cos^(-1)(2/9))/pi°  |  (180 cos^(-1)(2/9))/pi°  |  (180 cos^(-1)(73/81))/pi°)~~(1.3467 radians  |  1.3467 radians  |  0.448186 radians)
interior angle sum | 180° = pi rad