61. in the adjoining figure ind in AC
8
Ans: Here,
IN triangleAOB.
AO-OB (radius].
so that
angleOAB - LOBA: SO---
-
[Sum
all angles of a]
130
(From in
20A8+ LOBA BOA = 180°
So'50 + LBOA :
ZBOA 150 - 100
809
In
A BOC
(radius].
so that.
LOG: LOBO = 20"
LOCBt LOBCH CBOC.
20'+ 20+ Z BOC
2B0C
[From u.
LARG = LBOAT BOC
so' + 149
= 220
And reflex LAOC 360 - 220-
AC = 140
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