Anormal 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.

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

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

f(x) is   are being squared

g(x) is   increasing by 2

h(x) is adding .25 each time

k(x) is taking the square root

f(x) and k(x) are exponential functions