(1)根据方格中的长方形或正方形,把相关数据填写在下表。
图形 | 长/cm | 宽/cm | 长宽相差/cm | 周长/cm | 面积/ |
图① | 7 | 1 | 6 | 16 | 7 |
图② | |||||
图③ | |||||
图④ |
(2)仔细观察上表,可以发现一个规律:周长相等的长方形或正方形,长与宽相差的越小,面积就越
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