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3.14 x 10 x 10 = 314[area of circle]

10 x 3 =30 314+ 30 = 344 Ans:344cm2 perimeter;32

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(π=3.14)

Perimeter:53.5cm

Area: 11 * 3 = 33 33+78.5=111.5

3.14 * 5 * 5 = 78.5

And: it is 111.5cm²

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40 cm

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The front grill including the headlights have a total perimeter of 343cm

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Stefan

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Radius of 5cm

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Perimeter

6 * Pi =18.8 (cm/rounded to 1 decimal place)

18.8-4.4=14.4(cm)

14.4+11.3+11.3+4.4=41.4(cm)

It is 41.4cm

Area

6÷2=3 (radius of circle)

Pi*3*3=28.3(cm2)

11.3*4.4=49.72(area of rectangle)

49.72+28.3=78.02

~78.0 (cm2/rounded to 1 decimal place)

It is 78.0 cm2

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5.15cm

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10.3cm

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32.3cm

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Diameter=10.5xpii=10.pii

10pii+10.5x2+2.5=54.91592654

Area=piix5.25x5.25+10.5x2.5=112.2151475

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pi = 3.14

Perimeter

3.14 x 7.6 = 23.864 (circumference of circle)

23.864 - 4.5 = 19.364

19.364 + 8 + 4.5 + 8 = 39.864 (perimeter of figure)

The perimeter is 39.864cm.

Area

7.6 divide by 2 is 3.8 (radius)

3.14 x 3.8 x 3.8 = 45.3416 (area of circle)

8 x 4.5 = 36 (area of rect.)

36 + 45.3416 = 81.3416 (area of figure)

The area is 81.3416cm2

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abdomen : semi-circle and rectangle

thorax : triangle

13.5+12.5+12=38

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pi x 5 x 5 =78.5(round off to 1 decimal place)

perimeter = 8 + 8 + 5 = 21

pi x 10 =31.4(round off to 1 decimal place )

21 + 31.4 =52.4

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Perimeter:

10×π×1/2=15.7

15.7+10=25.7 (Perimeter of semicircle)

15+2.8+15+2.8=35.6 (Perimeter of rectangle)

25.7+35.6=61.3 (Total perimeter/Answer)

Area:

10÷2=5

5×5×π×1/2=39.25 (Area of semicircle)

15×2.8=42 (Area of rectangle)

39.25+42=81.25 (Area in total/Answer)

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0.8cm

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Area

Circle = 3.14 x 10 x 10 = 314 (sq cm)

Semi circle = 3.14 x 1.25 x 1.25 / 2 = 2.5 (sq cm)

Rectangle = 14 x 2.5 = 35 (sq cm)

Triangle = 2.5 x 2 / 2 = 2.5 (sq cm)

Total = 314 + 2.5 + 35 + 2.5 = 354 (sq cm)

Perimeter

Circle = 3.14 x 20 = 62.8

62.8 - 2.5 - 2.5 = 57.8 (cm)

Semi circle = 3.14 x 2.5 / 2 = 3.9 (cm)

Total = 57.8 + 3.9 + 2.5 + 2.5 + 14 + 14 = 94.7 (cm)

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perimeter

1/2 x 3.14 x 5 =7.85

15 + 2 + 15 + 2 =34

7.85 + 34 =41.85

41.85 + 10 =51.85

Ans: 51.85

Area

1/2 x 3.14 x 2.5 x 2.5 =9.813

15 x 2 =30

9.813 + 30 =39.813

Ans: 39.813

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area:

3.14 x 2.5 x 2.5 = 19.625

6 x 1.5 = 9

19.625 + 9 = 28.625

28.625 ≈ 28.6

perimeter:

3.14 x 5 = 15.7

6 + 1.5 + 6 + 1.5 = 15

15.7 + 15 = 30.7

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Rico 6A

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Area

Circle = 3.14 x 10 x 10 = 314 (sq cm)

Rectangle = 14 x 2.5 = 35 (sq cm)

Semi circle = 3.14 x 1.25 x 1.25 / 2 = 2.5 (sq cm)

Triangle = 2.5 x 2 / 2 = 2.5 (sq cm)

Total = 314 + 35 + 2.5 + 2.5 = 354 ( sq cm)

Perimeter

Circle = 3.14 x 20 = 62.8

62.80 - 2.5 - 2.5 = 57.8 cm

Semi circle = 3.14 x 2.5 / 2 = 3.9 cm

Total = 57.8 + 3.9 + 14 + 14 + 2.5 + 2.5 = 94.7 cm

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PI=22/7

Perimeter

22/7 x 10=31.42

11+11=22

3+3=6

22+6=28

31.42+28=59.42

Ans: It is 59.42cm

Area

3 x 11=33

22/7 x 5 x 5=78.57

78.57+33=111.57

Ans: It is 111.57cm2

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Area

1/2x3.14x5x5=39.25

39.25+10=49.25

Ans: 49.25cm2

Perimeter

1/2x3.14x10=15.7

15.7+10=25.7

Ans: 25.7

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Perimeter

4.1x4=16.4（perimeter of square）

3.14x2.5=7.85（circumference of circle）

Area

4.1x4.1=16.81（area of square）

3.14x1.25x1.25=4.90625（area of circle）

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π: 3.14

Perimeter

39.26

Area

3.14×4×4=50.24

3.14×1×1=3.14

3.14÷2=1.57

5×1=5

5+1.57+50.24=56.81

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Area: 1/2 x 3.14 x 5 x 5=39.25

39.25+(2x15)=69.25

Perimeter:

1/2x3.14x10=15.7

15.7+2+15+1+15=48.7

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1/2x3.14x10=17

2.3+8.7+8.7=19.7

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Area: 1/2x12.3x6.2=38.13

3.14x5x5=78.5

38.13+78.5=116.63

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D=5,d=4

area：3.14*2.5*2.5=19.625

3.14*2*2=12.56

19.625-12.56=7.065

the area is 7.065cm2

circumference:

3.14*5=15.7

the circumference is 15.7cm

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π=3.14

Perimeter:

11+3+11+3=28

3.14×10=31.4

31.4+28=59.4

59.4-3×2=53.4

Ans:it is 53.4cm

Area:

11×3=33

3.14×5×5=78.5

33+78.5=111.5

And: it is 111.5cm²

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I am super sorry i did the first one wrong:(

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area

3.14x4x4=43.9

9.5x1.5=14.2

14.2+43.9=58.

It is 58.1cm2

Perimeter

3.14x8=25.12

(9.5x2)+(1.5x2)=22

25.1+22=45.1

It is 45.1cm.

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3.14 x 10 x 10 = 314[area of circle]

10 x 3 =30 314+ 30 = 344 Ans:344cm2

3.14 x 20 = 62.8

10+10+3+3=26

62.8 +26 = 88.8 Ans:88.8cm

# data[].attributes.headline
Mdm Woo: Post a photo of a composite figure (involving circles) around you and calculate its area and perimeter. Show your steps clearly. You may pick an appropriate pi to use and if it involves decimals, round your answers off to the nearest 1 decimal place. Click on '+' to add a post.

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Mdm Woo: Post a photo of a composite figure (involving circles) around you and calculate its area and perimeter. Show your steps clearly. You may pick an appropriate pi to use and if it involves decimals, round your answers off to the nearest 1 decimal place. Click on '+' to add a post.

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smaller circle:

1.25cm

Bigger circle:

3.75cm

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smaller circle:

2.5cm

Bigger circle:

7.5cm

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I’m unsure to take pi as, 1, the calculator pi, 2, 22/7, and 3, 3.14. So I just recorded down everything:

Smaller circle:

Calculator pi(rounded to the nearest hundredth) - 7.85

22/7(rounded to the nearest hundredth) - 7.86

3.14 - 7.85

Bigger circle:

Calculator pi(rounded to the nearest hundredth) - 23.56

22/7(rounded to the nearest hundredth) - 23.57

3.14 - 23.55

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Of my mother’s phone camera :)

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1.08225361302

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2.1645072260497766

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6.8cm

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bottle cap(i dont know how to post a photo)

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“Erm, the diameter (5.5cm) divided by 2 is the radius (2.75cm)”.

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I just measured the picture I actually dk :p

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Man I sure love pie.

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Ancient china coin with a hole in it idk lol

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10.5cm

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21cm

# data[].attributes.body
44cm

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3cm

# data[].attributes.body
65.4cm

# data[].attributes.body
7 cm

# data[].attributes.body
1.15 cm

# data[].attributes.body
2.3 cm

# data[].attributes.body
12

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15cm

# data[].attributes.body
5.8cm

# data[].attributes.body
11.6cm

# data[].attributes.body
13.19

# data[].attributes.body
63.246

# data[].attributes.body
198.522cm