Page 131 - Math SL HB Sem 1
P. 131
(,0 The foltowrng diagraa shorvs a sector of a circle of radius rcm, a.d angle 0 at thr ceatre
The pe.rimeter of tlte sector is 20 cm.
(a) Shon that ,
-2o-2r .
r
..
b^t
O) TLe area of the sector is 25 cmr. Find the value of r., 5 cn
