Theorem: 1$ = 10 cent

Proof:

We know that $1 = 100 cents

Divide both sides by 100

$ 1/100 = 100/100 cents

=> $ 1/100 = 1 cent

Take square root both side

=> squr($1/100) = squr (1 cent)

=> $ 1/10 = 1 cent

Multiply both side by 10

=> $1 = 10 cent