Answer:
185
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
a² - b² ← is a difference of squares and is factored in general as
(a + b)(a - b)
42² - 38² ← is a difference of squares and factors as
42² - 38² = (42 + 38)(42 - 38) = 80(4) = 320 → D
Answer:
35°
Step-by-step explanation:
when two lines intersect like that, the opposite angles are called vertical angles, which means the opposite angles are congruent (aka the same)
Answer: 2π inches or 6.28 inches.
Step-by-step explanation:
To solve this problem you must apply the formula shown below:
![arclenght=(2r\pi)(C/360)](https://tex.z-dn.net/?f=arclenght%3D%282r%5Cpi%29%28C%2F360%29)
Where r is the radius and C is the central angle.
Subsitute values. Therefore, you obtain that the length of the arc is:
![arclenght=(2(8in)\pi)((45/360)](https://tex.z-dn.net/?f=arclenght%3D%282%288in%29%5Cpi%29%28%2845%2F360%29)
![arclenght=2\pi\ in=6.28in](https://tex.z-dn.net/?f=arclenght%3D2%5Cpi%5C%20in%3D6.28in)