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in Geometry by (49.9k points)
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Measures of the two angles between hour and minute hands of a clock at 9 O’ clock are

(A) 60°, 300° 

(B) 270°, 90°

(C) 75°, 285° 

(D) 30°, 330°

1 Answer

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Best answer

(B) 270°, 90°

We know that, measure of complete angle of clock is 360o.

From the figure, we can say that angle at 2 = (9/12) × 360o= 270o

Then, angle at 1 = 360o – 270o

= 90o

Therefore, measures of the two angles between hour and minute hands of a clock at 9 O’ clock are 270o and 90o.

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