
Nataliya D. answered 02/21/13
Patient and effective tutor for your most difficult subject.
Two angles are obtuse angels - 113º , and two angles are acute but they are not congruent angles, tail angle is smaller then head angle, but sum of all angle in quadrilateral are 360º
360º - (113 + 113 + 37)º = 97º
Nataliya D.
113+113+37+37 ? 360 !!!!!!!!!!
02/21/13