It should be noted that in a circle theorem, the angle that's at the center of the circle is twice the angle at the circumference.
<h3>Circle theorem.</h3>An overview of the circle theorem will be given as your information is incomplete. The angle that's in a semicircle is a right angle.
Also, the angles that are in the same segment are equal. Furthermore, the opposite angles that are in a cyclic quadrilateral equal 180°. The angle between the tangent and the radius is also 90°.
Learn more about circles on:
Answer: Period = 4
Amplitude = 3
<u>Step-by-step explanation:</u>
Period is the interval of one "cycle" before the pattern repeats.
If you notice that when x = 0, y = -4.
When does the pattern repeat (reach -4 again)?
Answer: when x = 4.
So the interval of one "cycle" is 4 units --> Period = 4.