Im confused on how to understand circle properties

Circles having equal radii are congruent.

Circles having different radii are similar.

The central angle which intercepts an arc is the double of any inscribed angle that intercepts the same arc (proof).

The radius perpendicular to a chord bisects the chord.

The chords equidistant from the center are equal in length.

Step-by-step explanation:

Circles having equal radii are congruent.

Circles having different radii are similar.

The central angle which intercepts an arc is the double of any inscribed angle that intercepts the same arc (proof).

The radius perpendicular to a chord bisects the chord.

The chords equidistant from the center are equal in length.

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.