甲:1、作OD的中垂线,交⊙O于B,C两点,
2、连接AB,AC,△ABC即为所求的三角形
乙:1、以D为圆心,OD长为半径作圆弧,交⊙O于B,C两点.
2、连接AB,BC,CA.△ABC即为所求的三角形.
对于甲、乙两人的作法,可判断()
A.甲、乙均正确 | B.甲、乙均错误 | C.甲正确、乙错误 | D.甲错误,乙正确 |
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