<prompt> Katika trapezoid ABCD, pande AB na CD ni sawa. Je, eneo la ABCD ni nini? asy AMC8 1999 14 Tatizo kalamu p linetype4 4;chora0,0--4,3--12,3--16,0--mzunguko;chora4,0--4,3, p;chora3.5,0--3.5, .5--4.0,0.5;lebomizani0.75A, 0,0, W;lebomizani0.75B, 4,3, NW;lebomizani0.75C, 12, 3, NE;lebomizani0.75D, 16, 0, E;lebomizani0.758, 8,3, N;lebomizani0.7516, 8,0, S;lebomizani0.753, 4, 1.5, E;asy  <response>: Wakati takwimu imegawanywa, kama inavyoonyeshwa pande zisizojulikana ni hypotenuses za pembetatu za kulia na miguu ya 3 na 4. Kutumia Nadharia ya Pythagorean hutoa ABCD5. Jumla ya mzunguko ni 1658534. asy AMC8 1999 14 Suluhisho kalamu p linetype4 4;kalamu r nyekundu;chora0,0--4,3--12,3--16,0--mzunguko;chora4,0--4,3, p;chora3.5,0--3.5, .5--4.0,0.5;lebomizani0.75A, 0,0, W;lebomizani0.75B, 4,3, NW;lebomizani0.75C, 12, 3, NE;lebomizani0.75D, 16, 0, E;lebomizani0.758, 8,3, N;lebomizani0.7516, 8,0, S;lebomizani0.753, 4, 1.5, E;lebomizani0.75E, 4,0, S, r;lebomizani0.75F, 12, 0, S,r;chora12,0--12,3, nyekundu;lebomizani0.753, 12, 1.5, W, r;chora11.5,0--11.5,0.5--12,0.5, r;lebomizani0.755, 2, 2.2, r;lebomizani0.755, 14, 2.2, r;lebomizani0.754, 2, 0, S, r;lebomizani0.754, 14, 0, S, r;asy 