The Measure Of (Arc)XY is 94*. What is the measure of XYZ, The Tangent-chord Angle?
2 answers:
Answer:
Option A. 47°
Step-by-step explanation:
Since m(Arc)XY = 94°
Therefore angle at the center = 94°
Now in triangle formed at the center
∠XOY = 94°
Now ∠OXY+∠XYO = 180 - ∠YOX = 180 - 94 = 86
and we know ∠OXY = ∠XYO
therefore ∠XYO = 86/2 = 43°
Now ∠XYO + ∠XYZ = 90°
∠XYZ = 90 - ∠XYO = 90 - 43 = 47°
Option A 47° is the answer.
You might be interested in
Using the z-distribution, it is found that the needed sample sizes are:
a) 242
b) 1842
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which z is the z-score that has a p-value of .
The margin of error is:
99% confidence level, hence, z is the value of Z that has a p-value of
, so
.
Item a:
The estimate is:
The sample size is <u>n for which M = 0.03</u>, then:
Rounding up, a sample of 242 is needed.
Item b:
No prior estimates, hence is used.
Rounding up, a sample of 1842 is needed.
For more on the z-distribution, you can check brainly.com/question/25404151