Naming Parts of a Circle: Circles, Radii, Diameters, and Chords

How is a circle named?

• By its center

• By its radius

• By any point on the circle

• By its diameter

What is the plural form of 'radius'?

• Radius

• Radii

• Radiuses

• Radi

Tags

CCSS.RF.3.3B

CCSS.RF.3.3C

CCSS.RF.3.3D

CCSS.RF.4.3A

CCSS.RF.5.3A

How do you name a radius?

• Using the circle's name

• Using the midpoint

• Using the two endpoints

• Using the diameter points

Are all radii of a circle congruent?

• Yes, they are all the same length

• No, they vary in length

• Only in equilateral circles

• Only if the circle is perfect

Tags

CCSS.HSG.C.A.2

What does a diameter of a circle represent?

• A line segment that divides the circle into two equal parts

• A chord that doesn't pass through the center

• A line connecting any two points

• The longest radius

Tags

CCSS.HSG.C.A.2

What makes a diameter special among all chords?

• It always passes through the center

• It is the only chord that can be named

• It is the shortest chord

• It connects the circle to its center

Tags

CCSS.HSG.C.A.2

How is a diameter related to the radius?

• It is half the length of a radius

• It is equal in length to a radius

• It is twice the length of a radius

• There is no relation

Tags

CCSS.HSG.C.A.2

Is every diameter a chord?

• No, diameters are not chords

• Yes, but not every chord is a diameter

• Yes, and every chord is a diameter

• Only in certain types of circles

Tags

CCSS.HSG.C.A.2

What is a chord in a circle?

• The longest possible line segment in a circle

• A line segment that connects any two points on the circle

• A line segment that divides the circle into two equal parts

• A line segment that connects the center to any point on the circle

How do you name a chord?

• By its position in the circle

• By its length

• Using the circle's name

• Using the two endpoints

Tags

CCSS.HSG.CO.A.1