28.3°=______°______′,43°36′=_______°
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34.37°=______° ______’______”
28.3°=______°______′,43°36′=_______°
18°______′24°______′32°______′11′______〃19′______〃22′______〃0.2′______°0.6′______°0.4′______°0.46〃______′0.39〃______′1.24〃______′三题,很抱歉。0.4〃______′0.3〃______′1.2〃______′
57.18°=_____度______分______秒
39.145°=______度______分_______秒
(>______
______
56°25′12〃=______度
一、在△ABC中,∠C=90°(1)若已知a、∠A,则∠B=______,b=______,c=______.(1)若已知c、∠B,则∠A=______,a=______,b=______.(1)若已知b、∠A,则∠B=______,a=______,c=______.(1)若已知c、∠A,则∠B=______,a=______
余角和补角20°的余角为______,补角为______.17°的余角为______,补角为______.70°32′的余角为______,补角为______.32°51′18〃的余角为______,补角为______. . 观察以上数据你能得到怎样的结论?你能用a
度分秒运算 16.7°=____°_____′_____ 76°32′24=______°_____′______ 32°27′18=________°43°35′49+56°45′24=______°_____′______56°25′24-43°35′29=______°_____′______69°-57°36′42=______°_____′__
度分秒运算 16.7°=____°_____′_____ 76°32′24=______°_____′______ 32°27′18=________°43°35′49+56°45′24=______°_____′______56°25′24-43°35′29=______°_____′______69°-57°36′42=______°_____′__
一往无前成语接龙一往无前______,______,______,______,______,______,______,______,______,______,______,左右逢源,______,______,______,______,______,______,______,______,______,神清气爽
明哲保身 ______ ______ ______ ______ ______
如图,已知ab//cd,∠1=70°则∠2=______ ,∠3=______ ,∠4=______.
简单的计算.35度25′36″=______° 90°-58°25′48″=______
whose is it?=_____ ______ ______ _____ ______?whose are they?=_____ ______ ______ _____ ______?
cos20°×cos40°×cos80°=______