Angle- side- angle, the triangles are connected and have a line between them (side), & you can see the 2 separate angles amongst them.
Answer:
circumcenter
Step-by-step explanation:
If points Q, R, S are on a circle, the sides of that triangle are chords of the circle. The point where the perpendicular bisectors of those chords meet is the center of that circumcircle. It is named the circumcenter.
Multiply by 100, as per cent means per 100.