问题
填空题
当时钟是1点45分时,分针和时针所成的钝角是______度.
答案
(360°÷60)×[20+(5÷60)×45],
=6°×[20+
×45],1 12
=6°×[20+3.75],
=6°×23.75,
=142.5°
答:分针和时针所成的钝角是142.5度.
故答案为:142.5.
当时钟是1点45分时,分针和时针所成的钝角是______度.
(360°÷60)×[20+(5÷60)×45],
=6°×[20+
×45],1 12
=6°×[20+3.75],
=6°×23.75,
=142.5°
答:分针和时针所成的钝角是142.5度.
故答案为:142.5.