First slide

Straight lines in 3D

Question

The angle between the lines x = 1, y = 2 and y = –1, z = 0 is

Moderate

A

$\frac{π}{2}$
B

$\frac{π}{6}$
C

$\frac{π}{3}$
D

$0^{0}$

Solution

The line x = 1, y = 2 is parallel to z-axis.
The line y = 1, z = 0 is parallel to x-axis.
Angle between the lines is $\frac{π}{2}$

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