Sagot :
yes i agree ×[tex] \left \{ {{y=2} \atop {x=2}} \right. [/tex]
If two lines intersect at the center of the circle, two pairs of vertical angles (non-adjacent) are formed. Vertical angles with common vertex at the center of the circle are congruent. Therefore, the arcs intercepted by each pair of vertical angles are also congruent.
Proof: Vertical angles theorem with the center as the point of intersection.
Proof: Vertical angles theorem with the center as the point of intersection.