(1)这个组合体的表面积是多少平方分米?
(2)在下面的方格中,A点的位置如图,先从右侧观察并将看到的图形绕A点顺时针旋转90°,然后画出旋转后的图形①,再画出这个图形向右平移9格,向下平移3格后的图形②.
(3)(2)中图形①的面积是多少平方厘米?周长是多少厘米?
(4)画出一个是轴对称图形的梯形,其面积比②的面积多,并画出一条对称轴.
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2