Question

A normal line is a line that is perpendicular to another line, curve or surface. Give an everyday example of a normal line to each of the following: another line, a circle, a plane.

Answer 1

a) A cross b) A stool c) One foot table

Explanation:

Hi there!

Check the pictures below for better visualizing.

a) Cross

The figure of a cross shows clearly one normal line perpendicular to another perpendicular one. They cross each other.

b) Circle

A stool has a normal line perpendicular to the ground.

c) One foot table

In this Table, we have a normal line perpendicular to the ground and its top.

Answer 2

Here are the examples for

1. a normal line to a line

The corner of a photo frame, or the corner of a note book

2. A normal line to a circle

A circular plate balanced on a scale

3. A normal line to a plane

The pole standing on a plain ground