Question

(2 x 4 = 8 marks)
a) Iwo semicircular parts are removed from a semicircular disc, as shown in Fig 7.
(i) Find area of the shaded region.
(ii) If a thread is to be placed around the boundary of the shaded region, find the
length of the thread required.
R
40 m
Fig. 7​

Answer 1

Answer:

the length I the same with the shaded region