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RideAnS [48]
3 years ago
12

State whether the given measurements determine zero, one, or two triangles. C = 31°, a = 13, c = 11

Mathematics
1 answer:
mina [271]3 years ago
7 0

9514 1404 393

Answer:

  2

Step-by-step explanation:

The given angle is opposite the shorter of the given sides, so there are two possible triangles.

__

<em>Additional comment</em>

The law of sines tells you that sin(A) = a/c·sin(C). There will be 0 triangles if that is greater than 1. There will be 1 triangle if that is exactly 1 (unlikely with rational values of sides and angles). There will be 2 triangles if sin(A) < 1, as it is here.

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I had to read this a couple of times to see this was not about time, but is a right triangle problem. If the hour hand is at three, let us consider that a leg of a right triangle, we will consider the hypotenuse as the second hand.
Sketch the picture. 

The hypotenuse is 9 cm. the angle is found by: 

the (hour hand) is pointing directly at the 12. I expect you mean the minute hand. The angle between the minute hand and the second hand is 25/60*360 = 150 which make the angle between the hour hand and the second hand. 150 -90 =60 

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cos 60 = x/9 

9 cos 60 =x 
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x = 4.5 cm

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
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