1. 56°24′36″=56°+(24/60)°+(36/3600)°=56.41° 2.72.28°=72°+0.28x60°=72°+16.8′=72°+16′+0.8x60″=72°16′48″
(1) 56°24′36〃等于多少度?(2) 72.28等于多少度,多少分,多少秒
1. 56°24′36″=56°+(24/60)°+(36/3600)°=56.41° 2.72.28°=72°+0.28x60°=72°+16.8′=72°+16′+0.8x60″=72°16′48″