<prompt> Mduara wa radius 1 umezungukwa na miduara 4 ya radius r kama inavyoonyeshwa. r ni nini?asyukubwa wa kitengo 0.6cm;kwaint i0; i2; ikwaint j0; j2; jchoraMduara-2.44.8i,-2.44.8j,2.4,upana wa mstari0.7;chora-2.44.8i,-2.44.8j---0.74.8i,-0.74.8j;lebor,-1.54.8i,-1.54.8j,SE;;choraMduara0,0,1,upana wa mstari0.7;chora0,0--1,0;lebo1,0.5,0,S;asy  <response>: Unda mraba ABCD kwa kuunganisha vituo vya miduara mikubwa, kama inavyoonyeshwa, na uzingatie isosceles kulia pembetatu BAD.asyukubwa wa kitengo 0.6cm;jozi A,B,C,D;A-2.4,2.4;B2.4,2.4;C2.4,-2.4;D-2.4,-2.4;choraA--B--C--D--mzunguko,upana wa mstari0.7;choraB--D,upana wa mstari0.7;leboA,A,NW;leboB,B,NE;leboC,C,SE;leboD,D,SW;lebo2,0,0,SE;kwa int i0; i2; ilebor,-2.4,-1.22.4i,W;lebor,-1.22.4i,2.4,N;lebor,-1.53i,-1.53i,NW;kwaint i0; i2; ikwaint j0; j2; jchoraMduara-2.44.8i,-2.44.8j,2.4,upana wa mstari0.7;;choraMduara0,0,1,upana wa mstari0.7;asyKwa kuwa AB AD 2r na BD 2 2r, tuna 22r2 2 2r2. Kwa hivyo 12rr22r2, quad textna quad r2-2r-10.Kutumia fomula ya quadratic kunatoa r1sqrt2. 