Introduction to Circles

What is the diameter?

• 8
• 16
• 10
• 4

Tags

CCSS.7.G.B.4

What is the radius?

• 18
• 72
• 38
• 14

Tags

CCSS.7.G.B.4

Which point is the center?

• O

• A

• B

• C

Which segment is the chord?

• DE

• BO

• AO

• AB

What is the definition of the center of a circle?

• A segment whose endpoints are on a circle.

• An angle whose vertex is the center of a circle.

• The point from which all points on a circle are equidistant.

• Two endpoints on a circle and all of the points on the circle between those two endpoints.

Lets remind ourselves, how many degrees are in a circle?

• 180 $\degree$

• $360\degree$

• $90\degree$

• 270 $\degree$

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

What is the radius of this circle?

(a)  

How many tangent lines can be drawn between these two circles?

(a)  

What kind of number is $\pi$  and why?