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Mathématiques

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Name _____________________________
Date ___________________

Classify the number as rational, irrational, or not a real number.
1.  * Cette fiche est prête à l'emploi.
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2.  
1

36

3.  
4.  
 - 
24

5.  
-1

2

6.  
331

18

7.  3.141592
8.  -18.59493408

Trouve la circonférence de chaque cercle. Exprime ta réponse en termes deet arrondis ta réponse à la dixième la plus proche.
9.  
radius =   15 m

10.  
diameter =   20 m

11.  
radius =   
7

6
 cm

12.  
diameter =   36.78 m

13.  
radius =   12.98 cm

14.  
diameter =   18 m


Complète.
15.  Diego was helping decorate the grassy field behind his school for the annual Mexican Independence Day fiesta. He laid out a circle with a diameter of twenty-eight feet on the ground and put posts around the circle to hold the rope decorated with green, white, and red pennants. How much rope will he need to go all the way around the circle if he adds three feet of rope to tie at the end?

16.  John's class made apple fritters at the Fall Festival this year. John brought eleven cans of shortening to fill the fryer. Each can was seven inches tall and had a radius of6.8inches. What was the total volume (in cubic inches) of the eleven cans of shortening? Round your answer to the nearest cubic inch.


Key #2
Trouve l'aire de chaque cercle. Exprime ta réponse en termes deet arrondis ta réponse à la dixième la plus proche.
17.  
radius =   25 m

18.  
radius =   5.62 m

19.  
diameter =   
1

1
 m

20.  
diameter =   16 cm

21.  
radius =   8.65 m

22.  
diameter =   46 m


Find the radius of the circle. (use= 3.14)
23.  
C  =  38.44 mm

24.  
A  =  121  m2

25.  
C  =  110.15 m

26.  
A  =  36  cm2

27.  
C  =  150.72 m

28.  
A  =  1256  cm2


Trouve levolume de chaque solide au dixième le plus proche (utilise= 3.14)
29.  
a  =  35.2 yd
b  =  64.3 yd




30.  
a  =  20 cm
b  =  12 cm
c  =  11 cm




31.  
a  =  6 ft
b  =  65 ft





Trouve levolume de chaque solide au dixième le plus proche (utilise= 3.14)
32.  
a  =  3.8 in
b  =  5.9 in
c  =  7.5 in

33.  
a  =  7 cm
b  =  8 cm
c  =  5 cm

34.  
a  =  7 km
b  =  10 km


Key #2
Trouve la superficie de chaque solide au dixième le plus proche (utilise= 3.14)
35.  
a  =  56 cm
b  =  76 cm
c  =  66 cm
d  =  65 cm

36.  
a  =  6.3 mm
b  =  8.5 mm
c  =  9.9 mm

37.  
a  =  47 in
b  =  48 in
c  =  53 in


Complète.
38.  A coil of wire was found lying in the shipyard. Abigail wondered if it would be enough to temporarily hold some steel plates in position while they were being welded. The wire was braided steel1-cm thick. The coil was neatly wound in a single layer around a wooden spool1.3meters in diameter. The wire spanned a distance of59cm on the spool. She needed301meters of wire to do the job. Is the coil of wire long enough for her purposes?

39.  Combien17-cm diameter chocolate chip cookies can be made using861chocolate chips if the chip density on the surface of each cookie is0.4per cm2?


Complète.
40.  If a log that is42pièds en longeur et4feet in diameter is cut into three equal pieces, what will be the surface area of each piece?

41.  A cylinder can approximate the shape of a snake. Which snake would have the most volume, one that is77cm long and11cm in diameter, or one that is50cm long and15cm in diameter?



Answer Key


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Mathématiques

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