我唔識理解呢條數學題,唔該幫幫我翻譯成中文,THX ~~
A figure formed by 3 arcs of radius 2 cm is drawn by a pair of compasses
(as shown in Fig.1) .Two identical figures of this shape are drawn on a card
and then cut out. One of them is fixed and the other one rolls along the sides
of the fixed figure without sliding.
Fig.2 shows the starting position of rolling. Find the area (in cm square ) of
the region that is covered by the moving figure.