问题
填空题
已知圆锥的底面半径为1cm，母线长为3cm，则其全面积为______cm2．
答案
底面圆的半径为1cm，
则底面周长=2πcm，底面积是πcm2．
侧面面积=
×2π×3=3πcm2．1 2
则全面积=3π+π=4πcm2．
搜题请搜索小程序“爱下问搜题”
已知圆锥的底面半径为1cm，母线长为3cm，则其全面积为______cm2．
底面圆的半径为1cm，
则底面周长=2πcm，底面积是πcm2．
侧面面积=
×2π×3=3πcm2．1 2
则全面积=3π+π=4πcm2．
| 完形填空。 | ||||
| Jim is 1 American boy.He's a 2 student.His teacher is Miss Gao.Jim helps his teacher to put 3 books and the tape recorder on the desk every day.They have a new 4 .In it you can 5 40 desks and chairs. 6 a blackboard,a clock and a map 7 the wall.Here are some pens on the desks. The red 8 is Jim's.The others are John's.John is Jim's 9 friend,Ann isn't 10 here today.She is ill.Look at the clock.It's four o'clock.It's time to play games. | ||||
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