Question

determine if each statement is always, sometimes, or never true. 1 parallel lines are always coplanar. 2 perpendicular lines are coplanar. 3 distance around an unmarked circle can be measured.

Explanation:

Step1: Perpendicular lines in 3D

Perpendicular lines can be coplanar (intersecting) or non-coplanar (skew).

Step2: Unmarked circle measurement

Use a string to wrap around, then measure the string length.

Answer:

1. sometimes
2. always