<prompt> Pointi C0,p iko kwenye mhimili wa y kati ya Q0,12 na O0,0 kama inavyoonyeshwa. Bainisha usemi wa eneo la pembetatu COB kulingana na p. Jibu lako linapaswa kurahisishwa iwezekanavyo. asyukubwa5cm;kalamu chaguomsingifontsize9;jozi o 0, 0; jozi q 0, 12; jozi b 12, 0;jozi a 2, 12; jozi t 2, 0; jozi c 0, 9;chora-2, 0--15, 0, Kishale;chora0, -2--0, 15, Kishale;choraq--a--b;choraa--t;choraa--c--b;leboQ0, 12, q, W;leboA2, 12, a, NE;leboB12, 0, b, S;leboO0, 0, o, SW;lebox, 15, 0, E;leboy, 0, 15, N;leboT2, 0, t, S 0.6 E;leboC0, p, c, W;asy  <response>: Kwa kuwa CO ni sawa na OB, tunaweza kuchukulia CO kama urefu wa pembetatu COB na OB kama msingi. Eneo la pembetatu COB ni frac12times OBtimes CO frac12times12-0timesp-0 frac12times12times p6p. 