The arc length of the semicircle is 5π units
<h3>Calculating length of an arc</h3>
From the question, we are to calculate the arc length of the semicircle
Arc length of a semicircle = 1/2 the circumference of the circle
∴ Arc length of a semicircle = 1/2 × 2πr
Arc length of a semicircle = πr
Where r is the radius
From the given information,
r = 5
∴ Arc length of the semicircle = 5 × π
Arc length of the semicircle = 5π units
Hence, the arc length of the semicircle is 5π units
Learn more on Calculating length of an arc here: brainly.com/question/16552139
#SPJ1
The formula of a distance between two points A and B is :

You should this formula by heart.
Then, you just have to apply it ! :D
Here :




Therefore :




In short, the answer would be the first option :

.
Hope this helps !
Photon
Hence, the value of x is 1.
<h2>What is length?</h2>
Length is defined as the measurement or extent of something from end to end. In other words, it is the larger of the two or the highest of three dimensions of geometrical shapes or objects.
<h3>How to solve?</h3>
It can be observed that the given 2 triangles are congruent.
we know, for congruent triangles, the length of corresponding sides is equal.
Hence,
AB = DE
4x - 1 = x + 2
3x = 3
x=1
Therefore, the value of x is 1.
to learn more about length: brainly.com/question/18077445
#SPJ4
(4xy - 3z)²
(4xy - 3z)(4xy - 3z)
4xy(4xy - 3z) - 3z(4xy - 3z)
16x²y² - 12xyz -12xyz + 9z²
16x²y² - 24xyz + 9z², a perfect square trinomial.