Question

Why is it important to look perpendicularly downwards at the object,

especially when measuring with a thick ruler?​

Answer 1

Answer:

Parallax error occurs when the measurement of an object's length is more or less than the true length because of your eye being positioned at an angle to the measurement markings

Answer 2

Answer:

Parallax error occurs when the measurement of an object's length is more or less than the true length because of your eye being positioned at an angle to the measurement markings.

Hope this helps you.

Please mark it as Brainliest.