3.  ,e;jpahtpd; kpfr; rpwe;j fzpj Nkij
gpuk;k Fg;gjh.
 ,tuJ je;ij [p];Z vd;gtUf;F kfdhf
tl F[uhj;jpy; gpdkhyh vd;Dkplj;jpy; fp.gp 598
Mk; Mz;L gpwe;jhh;.

4.  gpuk;k ];Gl rpj;jhe;jk; vd;Dk; E}y; 24
mj;jpahaq;fisf; nfhz;ljhFk;.
 ,jpy; 1008 nra;Al;fs; cs;sd.
 me;E}ypy; vz;fzpjk;,my;[{g;uh gw;wpa gy
jfty;fs; $wg;gl;Ls;sd.
 gpuk;k Fg;jhtpd; Njw;wk; ,U Kf;Nfhzq;fspy;
gf;fq;fshy; cUthf;fg;gl;l ehw;fuj;jpd;
jd;ikia vLj;Jiuf;fpwJ

5.  A,B,C,D vd;gJ ehw;fuk;
a,b,c,d ehw;fuj;;jpd; gf;f msTfs;
ehw;fuj;jpd; Rw;wsT 2s vd;W gpuk;k Fg;jh
Fwpg;gpl;Ls;shh;
ehw;fuj;jpd; Rw;wsT 2s =a+b+c+d
gug;gsT = √(s-a)(s-b)(s-c)(s-d)
s=a+b+c+d/2
,r;#j;jpuk; tl;lehw;fuj;jpw;F kl;LNk nghUe;Jk;.

6.  Fiw vz;fSf;F Kd;dhy; Gs;sp my;yJ rpwpa
tl;lj;ij ,l;L vz;fis milahsk; fhl;bdhh;.
 22/7 vd;gJ ∏ d; kjpg;G vdTk; mjd; khwhj
KOvz; kjpg;G 3 vd;gijAk; tpsf;fpAs;shh;.
 a-a=0.