<prompt> Pembetatu ina wima P-8,5, Q-15,-19, na R1,-7. Mlinganyo wa sehemu-mbili ya angle P inaweza kuandikwa katika muundo ax2yc0. Tafuta ac.asy kuagiza grafu; pointpennyeusi;njiamweusiupana wa mstari0.7;kalamu f fontsize10; jozi P-8,5,Q-15,-19,R1,-7,S7,-15,T-4,-17; MPP,P,N,f;MPQ,Q,W,f;MPR,R,E,f; DP--Q--R--cycle;DP--T,EndArrow2mm; D-17,0--4,0,Mishale2mm;D0,-21--0,7,Mishale2mm; asy  <response>: asy kuagiza grafu; pointpennyeusi;njiamweusiupana wa mstari0.7;kalamu f fontsize10; jozi P-8,5,Q-15,-19,R1,-7,S7,-15,T-4,-17,U IPP--T,Q--R; MPP,P,N,f;MPQ,Q,W,f;MPR,R,E,f;MPP,U,SE, f; DP--Q--R--cycle;DU;DP--U; D-17,0--4,0,Mishale2mm;D0,-21--0,7,Mishale2mm; asyTumia nadharia ya kugawanya pembe ili kupata kwamba kipigo cha pembe mbili cha angle P kinagawanya QR katika sehemu za urefu frac25x frac1520 -x Longrightarrow x frac252, frac152. Inafuata kwamba fracQPRP frac53, na hivyo P leftfrac5x_R 3x_Q8,frac5y_R 3y_Q8kulia -5,-232.Jibu linalohitajika ni mlingano wa mstari PP. PP ina mteremko frac-112, ambapo tunapata mlinganyo kuwa 11x 2y 78 0. Kwa hiyo, a c 89 . 