Prove: If a chord of a circle has a common end point with a diameter and makes an angle of 30° with it, prove that the distance from the center to the chord is one-fourth the length of the diameter.

Step-by-step explanation:

The perpendicular distance between the chord and the center of the circle forms a right triangle with the chord and the radius.  Using trig:

sin 30° = x / (D/2)

sin 30° = 2x / D

1/2 = 2x / D

x = D/4

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.

i'm not really sure how to answer that

step-by-step explanation: