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(30') is equal to how many degrees?

Answer and explanation

Correct answer: (\frac{1}{2}^\circ)

The direct answer is option A, \(\frac{1}{2}^{\circ}\). An angle of one degree is divided into 60 minutes, so \(1^{\circ}=60'\). Therefore one minute is \(1'=\frac{1}{60}^{\circ}\). For 30 minutes, multiply by 30: \(30'=30\times\frac{1}{60}^{\circ}=\frac{30}{60}^{\circ}=\frac{1}{2}^{\circ}\). Option A is correct. Option B, \(1^{\circ}\), represents 60 minutes, not 30. Option C, \(2^{\circ}\), represents 120 minutes. Option D, \(\frac{1}{3}^{\circ}\), would equal 20 minutes, since \(60\times\frac{1}{3}=20\). Remember that the prime mark denotes minutes, not multiplication. Memory cue: convert angle minutes to degrees by dividing by 60.

Related tags

TrigonometryAnglesMinutes-To-Degrees

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