问题 解答题
请认真计算填写下表
图形名称已知条件侧面积表面积体积
圆柱底面半径3cm,高5cm__________________
圆锥底面直径8cm,高7.8cm--------______
圆锥底面周长12.56cm,高1.5cm--------______
答案

(1)侧面积:3.14×3×2×5=94.2(平方厘米),

表面积:2×3.14×32+94.2,

=6.28×9+94.2,

=56.52+94.2,

=150.72(平方厘米),

体积:3.14×32×5,

=3.14×9×5,

=3.14×45,

=141.3(立方厘米),

(2)

1
3
×3.14×(8÷2)2×7.8,

=3.14×16×2.6,

=50.24×2.6,

=130.624(立方厘米),

(3)12.56÷3.14÷2=2(厘米),

1
3
×3.14×22×1.5,

=3.14×4×0.5,

=6.28(立方厘米);

图形名称已知条件侧面积表面积体积
圆柱底面半径3cm,高5cm94.2cm150.72cm2141.3cm3
圆锥底面直径8cm,高7.8cm--------130.624cm3
圆锥底面周长12.56cm,高1.5cm--------6.28cm3

单项选择题 A1型题
单项选择题