Answer:
i think they are both correct
Given:
Consider the below figure attached with this question.
![\angle ABO=20^\circ](https://tex.z-dn.net/?f=%5Cangle%20ABO%3D20%5E%5Ccirc)
![\angle ACO=30^\circ](https://tex.z-dn.net/?f=%5Cangle%20ACO%3D30%5E%5Ccirc)
To find:
The value of x.
Solution:
Draw a line segment OA as shown below.
In triangle ABO,
[Radii of same circle]
[Base angles of an isosceles triangle]
In triangle ACO,
[Radii of same circle]
[Base angles of an isosceles triangle]
Now,
![m\angle BAC=m\angle BAO+m\angle CAO](https://tex.z-dn.net/?f=m%5Cangle%20BAC%3Dm%5Cangle%20BAO%2Bm%5Cangle%20CAO)
![m\angle BAC=20^\circ+30^\circ](https://tex.z-dn.net/?f=m%5Cangle%20BAC%3D20%5E%5Ccirc%2B30%5E%5Ccirc)
![m\angle BAC=50^\circ](https://tex.z-dn.net/?f=m%5Cangle%20BAC%3D50%5E%5Ccirc)
Central angle is always twice of angle subtended by two points on the circle.
![m\angle BOC=2\times m\angle BAC](https://tex.z-dn.net/?f=m%5Cangle%20BOC%3D2%5Ctimes%20m%5Cangle%20BAC)
![x=2\times (50^\circ)](https://tex.z-dn.net/?f=x%3D2%5Ctimes%20%2850%5E%5Ccirc%29)
![x=100^\circ](https://tex.z-dn.net/?f=x%3D100%5E%5Ccirc)
Therefore, the value of x is 100°.
Answer:
A and B
Step-by-step explanation:
Vertical angles are angles that are opposite of each other on two crossing lines.
They have equal angle measure.
When we look at the image, we can tell that, from the given options:
A. <LRA and <FRA and
B. <TRF and <NRL are vertical angles.
Answer:
The answer is the length of time in one time interval