答案
解:(1)∵25.72°=25°+0.72°,0.72゜=0.72×60′=43.2′,0.2′=0.2×60′=12″,
∴25.72°=25°43′12″;
(2)∵30″=0.5′,12.5′=12.5×(
)°=0.21°,
∴45°12′30″=45.21°.
解:(1)∵25.72°=25°+0.72°,0.72゜=0.72×60′=43.2′,0.2′=0.2×60′=12″,
∴25.72°=25°43′12″;
(2)∵30″=0.5′,12.5′=12.5×(
)°=0.21°,
∴45°12′30″=45.21°.