问题
选择题
9时整,时针与分针成( )角.
A.30°
B.60°
C.90°
D.180°
答案
9时整,时针和分针之间的角度是:
360°÷60×15,
=6°×15,
=90°;
答:在9时整时,时针和分针所成的角度是90°.
故选:C.
9时整,时针与分针成( )角.
A.30°
B.60°
C.90°
D.180°
9时整,时针和分针之间的角度是:
360°÷60×15,
=6°×15,
=90°;
答:在9时整时,时针和分针所成的角度是90°.
故选:C.