The circle is actually the inner part of the circumference, i.e., the enclosed area inside the circle frame.

Below are some examples of circles with different circumferences. The colored part in each represents the circle:

The circle is actually the inner part of the circumference, i.e., the enclosed area inside the circle frame.

Below are some examples of circles with different circumferences. The colored part in each represents the circle:

Question 1

There are only 4 radii in a circle.

Question 2

M is the center of the circle.

Perhaps \( MF=MC \)

Question 3

M is the center of the circle.

In the figure we observe 3 diameters?

Question 4

M is the center of the circle.

Perhaps \( AB=CD \)

Question 5

In which of the circles is the segment drawn the radius?

There are only 4 radii in a circle.

A radius is a straight line that connects the center of the circle with a point on the circle itself.

Therefore, the answer is incorrect, as there are infinite radii.

False

M is the center of the circle.

Perhaps $MF=MC$

Yes

M is the center of the circle.

In the figure we observe 3 diameters?

No

M is the center of the circle.

Perhaps $AB=CD$

No

In which of the circles is the segment drawn the radius?

Question 1

Is there sufficient data to determine that

\( GH=AB \)

Question 2

In which of the circles is the center of the circle marked?

Question 3

In which of the circles is the point marked in the circle and not on the circumference?

Question 4

Is it possible that the circumference of a circle is 8 meters and its diameter is 4 meters?

Question 5

Perhaps \( P=\pi\times EF \)

Is there sufficient data to determine that

$GH=AB$

No

In which of the circles is the center of the circle marked?

In which of the circles is the point marked in the circle and not on the circumference?

Is it possible that the circumference of a circle is 8 meters and its diameter is 4 meters?

Impossible

Perhaps $P=\pi\times EF$

Yes

Question 1

M is the center of the circle.

Perhaps \( CM+MD=2EM \)

Question 2

M is the center of the circle.

Is AB the diameter?

Question 3

Perhaps \( MF+MD=AB \)

Question 4

M is the center of the circle.

Perhaps \( 0.5DC=EM \)

Question 5

Is it possible for the circumference of a circle to be \( 10\pi \) if its diameter is \( 2\pi \) meters?

M is the center of the circle.

Perhaps $CM+MD=2EM$

Yes

M is the center of the circle.

Is AB the diameter?

No

Perhaps $MF+MD=AB$

No

M is the center of the circle.

Perhaps $0.5DC=EM$

Yes

Is it possible for the circumference of a circle to be $10\pi$ if its diameter is $2\pi$ meters?

No.