Planlleu by the students! 12.
TO
A B
36
₂
semicircles? (Take A =
22 쭉
e
respectively.]
centres alternately at A and B, starting with centre
A spiral is made up of successive semicircles, with
at A, of radii 0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm, ..
as shown in Fig. 5.4. What is the total length of
such a spiral made up of thirteen consecutive
(Hint: Length of successive semicircles is llz, 14, ... with centres at A, B, A, B, ...,​