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levacccp [35]
2 years ago
9

39 125° Find the value of x

Mathematics
1 answer:
Savatey [412]2 years ago
8 0

Answer:

Step-by-step explanation:

The sum of the interior angles of this triangle must be 180 degrees.

Thus, angle x is 180 degrees less (39 degrees plus 125 degrees), or

x = 180 degrees - 164 degrees = 16 degrees.

Because of the 125 degree angle, this is an obtuse triangle.

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A chord is 15 cm long. It is 9 cm from the center of the circle. What is the radius of the circle?
irakobra [83]

Answer:

<h2>11.72cm</h2>

Step-by-step explanation:

Given a chord of distance of 15cm, if it is 9cm from the center of a circle, this means that the 9cm length will be projecting from the centre of the circle perpendicular to the chord and passing through its centre.

Since the radius of a circle is a line that is drawn from the centre of a circle to ts circumference, the set up will form a right angles triangle within the circle with the hypotenuse as the radius and the other two sides as the opposite and adjacent respectively. Using the Pythagoras theorem to get the length of the radius (hypotenuse);

hyp² = opp² + adj²

Let the opposite be the 9cm length

Adjacent will be half of the chord length = 15/2 = 7.5cm

Substituting this values into the formula we will have;

hyp² = 9² + 7.5²

hyp² = 81+56.25

hyp² = 137.25

hyp² = √137.25

hyp = 11.72

<em></em>

<em>Hence the radius of the circle is approximately 11.72 cm long</em>

5 0
2 years ago
Mrs. Trout estimated her math class next year would include 28 students. The actual size of the class turned out to be 32 studen
Alja [10]
The answer she has is not correct.
 All the steps she did are correct, except they forgot to convert the decimal answer into the proper percentage by multiplying it by 100.

The correct answer should be 0.125 * 100 = 12.5%
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3 years ago
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Angles A and B are exactly the same because
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Help help me besties ​
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Answer:

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