in the figure, X and Y are the centres of the circles C1 and C2 respectively. A rubber band is tied on the circles. If sum of the radii of C1 and C2 is 15 cm and XY = 30cm. Find the total length of the rubber band.
幅圖系一個"8"字打橫放
知名不具八星無敵會員2011-1-3 20:56#368
原帖由 CaO系咩 於 11-1-3 08:54 PM 發表
頂 D數咁Q難 點Q計呀
in the figure, X and Y are the centres of the circles C1 and C2 respectively. A rubber band is tied on the circles. If sum of the radii of C1 and C2 is 15 cm and XY = 30cm. Find ...
in the figure, X and Y are the centres of the circles C1 and C2 respectively. A rubber band is tied on the circles. If sum of the radii of C1 and C2 is 15 cm and XY = 30cm. Find ...