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kayranicole1
01.04.2020 •
Mathematics
In circle M with m \angle LMN= 102m∠LMN=102 and LM=11LM=11 units find the of arc length of LN. Round to the nearest hundredth.
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Ответ:
Given:
In a circle M with the measure of ∠LMN = 102° and LM = 11 units.
We need to determine the arc length of LN
Arc length of LN:
The arc length of LN can be determined using the formula,
where r is the radius and
is the central angle.
Substituting
and
in the above formula, we get;
Simplifying, we get;
Rounding off to the nearest hundredth, we get;
Thus, the arc length of LN is 19.57 units.
Ответ:
First a more theoretical approach.
Suppose that we have a point (x, y), if you want to do a reflection over the y-axis, this point will transform into (-x, y).
This reflection leaves unchanged the distance between the point and the closest point to the axis of reflection.
Below, you can see a rough sketch of the situation.
Where the distance between the point S and the axis of reflection is 2 units, and the same for the distance between S' and the axis of reflection.
"Do you think you would see the same characteristic if you drew the line segment connecting T with the reflecting line and then T' with the reflecting line? How do you know?"
Yes, because as i wrote above, the distance between the point and the axis of reflection is invariant in this type of transformations.