SOLUTION: A 20-inch chord is drawn in a circle with a 12-inch radius. What is the angular size of the minor arc of the chord? What is the length of the arc, to the nearest tenth of an inch?

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Question 1158589: A 20-inch chord is drawn in a circle with a 12-inch radius. What is the angular size of the minor arc of the chord? What is the length of the arc, to the nearest tenth of an inch?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
Drew picture not shown here, distance from center to the chord, . See a right triangle, hypotenuse 12 same as radius, leg 10 units.

An angle measure betwen the described distance and the hypotenuse, ; and you want TWICE this angle: 112.88 degrees.

The major arc is 247.11 degrees.

Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

A 20-inch chord is drawn in a circle with a 12-inch radius. What is the angular size of the minor arc of the chord? What is the length of the arc, to the nearest tenth of an inch?


Therefore, central ∡ = minor arc =
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