s. dann 2.00 u. t&nm~u~&&s~md~d r~cncil~~~~u-~u~hrhl~ ~4at~m4s~rit-1~4~ b ~ r i ~ & d w w o ~ w n. IS m4 a. 156 ulCi ti. 16 u7i 4. 1 6 6 u d

1

22, AABC 1 6= 90" h AB= c, AC = b us= BG = a u h c6 -a6 - b6 &hcri1~~$01~1rioWd n. + qo6cla u. 3 k3 3e2 R . - ( a 3 + b 3 ) 4. - (a4+b?)

zJ5 2

25. AABC 4 A = 60' oc~- 6 = 9flQ ha~nthu&n%~u A Itlm BC d?e D

AB 25. mub~dsu ABC adah u :,d sin2 A + sin2 B = 1 ih AC = 2BG uih - d+h~ri,