1.2 Chord, Radius, Diameter

The diagram is a circle with center O. Select 3 segments that are chords.

•  $\overline{AO}$  

•  $\overline{EF}$  

•  $\overline{CE}$  

•  $\overline{BO}$  

•  $\overline{CD}$  

The diagram is a circle with center O. How many different segments can you name as radius? Hint:  $\overline{CO}$  is a radius, so that's one; but is this the only one? Type a number in the box.

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CCSS.HSG.C.A.2

The diagram is a circle with center O. There is one diameter shown in this diagram. Which segment is the diameter?

•  $\overline{AO}$  

•  $\overline{AF}$  

•  $\overline{COD}$  

•  $\overline{CD}$  

The diagram is a circle with center O. Select all segments that are radii (radius). 

•  $\overline{AO}$  

•  $\overline{EF}$  

•  $\overline{CE}$  

•  $\overline{BO}$  

•  $\overline{DO}$  

The diagram is a circle with center O. If  $\overline{CD}$  is 12 units long, what is the length of  $\overline{BO}$  ?

• 12

• 10

• 8

• 6

The diagram is a circle with center O. If  $\overline{FO}$  is 10 units long, what is the length of  $\overline{CD}$  ?

• 20

• 10

• 5

• Cannot be determined

The diagram is a circle with center O. If  $\overline{FO}$  is 10 units long, what is the length of  $\overline{CD}$  ?

• 20

• 10

• 5

• Cannot be determined

The diagram is a circle with center O. If  $\overline{EF}$  is 7 units long, can you tell the length of  $\overline{CD}$  ?

• Yes, it's 14

• No, not enough info since chord doesn't really relate to diameter in terms of length

• Maybe..

• I can guess like maybe more than 7 but for sure less than 10

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CCSS.HSG.C.A.2

The diagram is a circle with center O. If  $\overline{BO}$  is 13 units long, what is the length of  $\overline{FO}$  ?

• 26

• 17

• 13

• Cannot be determined

The diagram is a circle with center H. There are 5 segments that are radii (radius). TRUE or FALSE?

• TRUE

• FALSE