# Pi - Examples, Exercises and Solutions

Pi is a mathematical value, approximately equal to $3.14$. This is the commonly used approximation for calculations.

Pi is symbolized by $π$.

Examples of some mathematical expressions include $π$:

$P=2\times R\timesπ$

$S=π\times R\times R$

## examples with solutions for pi

### Exercise #1

There are only 4 radii in a circle.

### Step-by-Step Solution

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

False

### Exercise #2

Is there sufficient data to determine that

$GH=AB$

No

### Exercise #3

M is the center of the circle.

Perhaps $AB=CD$

No

### Exercise #4

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

### Exercise #5

M is the center of the circle.

Perhaps $MF=MC$

Yes

### Exercise #6

M is the center of the circle.

In the figure we observe 3 diameters?

No

### Exercise #7

M is the center of the circle below.

$AB=10$

Can a chord with a length of 15 cm be drawn in the circle?

No

### Exercise #8

M is the center of the circle shown below.

AB is a chord in the circle and is 8 long.

Which of the options is a reasonable length for circle's diameter?

### Video Solution

$16$

### Exercise #9

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

Impossible

### Exercise #10

M is the center of the circle.

Perhaps $CM+MD=2EM$

Yes

### Exercise #11

Perhaps $MF+MD=AB$

No

### Exercise #12

M is the center of the circle.

Is AB the diameter?

No

### Exercise #13

M is the center of the circle.

Perhaps $0.5DC=EM$

Yes

### Exercise #14

Perhaps $P=\pi\times EF$

Yes

### Exercise #15

Is it possible that a circle with a circumference of 50.6 meters has a diameter of 29 meters?

No.