<prompt> Katika mchoro ulio hapa chini, pembetatu ABC ni isosceles na eneo lake ni 240. Je, y-coordinate ya A ni nini?asykuagiza olympiad; Chora na uweke lebo shokachora0, -3--0, 30, Kishale;chora-3, 0--30, 0, Kishale;leboy, 0, 30, N;lebox, 30, 0, E; Chora pembetatujozi a 10, 24; jozi b 0, 0; jozi c 20, 0;kuchoraa--b--c--mzunguko;nukta a; nukta b; nukta c; Pointi za leboleboA, a, N;leboB0, 0, b, NW;leboC20, 0, c, S; Alama za tikiongezavijitia--b, s45;ongezavijitia--c, s45;asy  <response>: Msingi wa pembetatu ABC yaani, BC una urefu wa 20.Kwa kuwa eneo la pembetatu ABC ni 240, basi 240frac12bhfrac1220h10h,so h24. Kwa kuwa urefu wa pembetatu ABC kutoka msingi BC ni 24, basi y-coordinate ya A ni 24. 