<prompt> Katika mchoro, eneo la mstatili ABCD ni 40. Eneo la MBCN ni nini? asykuagiza olympiad;jozi a 0, 0; jozi m 4, 0; jozi b 8, 0; jozi c 8, -5; jozi n 6, -5; jozi d 0, -5;choram--n;kuchoraa--b--c--d--mzunguko;leboA, a, NW; leboB, b, NE; leboC, c, SE; leboD, d, SW;leboM, m, N; leboN, n, S;lebo4, midpointa--m, N; lebo4, midpointm--b, N;lebo2, midpointn--c, S;asy  <response>: Kwa kuwa eneo la mstatili ABCD ni 40 na AB8, basi BC5.Kwa hivyo, MBCN ni trapezoid yenye urefu wa 5 na besi sambamba za urefu wa 4 na 2, vivyo hivyo ina eneo frac1254215. 