Which of the following number(s) are rational? Select all that apply.
2 answers:
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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
