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David made a swing for his niece Sarah using ropes 2.4 m long, so that Sarah swings throuh an arc of length 1.2 m. Determine the angle through which Sarah swings, in both radians and degrees.

• math -

Have you learned the formula
arc length = r(theta) where theta is in radians ?

we know
.5 radians = (90/pi)º = appr. 28.65º

• math -

28.6

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