## Elementary Geometry for College Students (7th Edition) Clone

x=4$^{\circ}$
Angles 2 and 8 are same side exterior angles so they are supplementary. m$\angle$2+m$\angle$8=180 (x$^{2}$-1)(x+1)+185-x$^{2}$(x+1)=180 x$^{3}$+x$^{2}$-x-1+185-x$^{3}$-x$^{2}$=180 -x=-4 x=4