Geometry! ZK, ZL, ZM are perpendicular bisectors of AGHJ. Select two options that are true.please I need help I don’t get it!!!!

Answer:
Answer B and C
Step-by-step explanation:
Z is the center of the circle passing through H,G,J:
HZ=85=ZG=ZJ ==> ZJ=85 : B is true
HK=KG=136/2=68: C is true.