## Question

###### Plane $Z$ passes through the center of sphere $Q$.a. Explain why $Q R=Q S=Q T$b. Explain why the intersection of the plane and the sphere is a circle. (The intersection of a sphere with any.plane passing through the center of the sphere is called a great circle of the sphere.)

Plane $Z$ passes through the center of sphere $Q$. a. Explain why $Q R=Q S=Q T$ b. Explain why the intersection of the plane and the sphere is a circle. (The intersection of a sphere with any.plane passing through the center of the sphere is called a great circle of the sphere.)

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