gaokao 2020 Q12

gaokao · China · national-I-arts 5 marks Not Maths

Let $A , B , C$ be three points on the surface of sphere $O$, and $\odot O _ { 1 }$ be the circumcircle of $\triangle A B C$. If the area of $\odot O _ { 1 }$ is $4 \pi$ and $A B = B C = A C = O O _ { 1 }$ , then the surface area of sphere $O$ is
A. $64 \pi$
B. $48 \pi$
C. $36 \pi$
D. $32 \pi$

Let $A , B , C$ be three points on the surface of sphere $O$, and $\odot O _ { 1 }$ be the circumcircle of $\triangle A B C$. If the area of $\odot O _ { 1 }$ is $4 \pi$ and $A B = B C = A C = O O _ { 1 }$ , then the surface area of sphere $O$ is

A. $64 \pi$

B. $48 \pi$

C. $36 \pi$

D. $32 \pi$

Paper Questions

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