Pi, Greek letter (π), is the symbol for the ratio of the circumference of a circle to its diameter.
Pi Day is celebrated by math enthusiasts around the world on March 14th (π = 3.14...).
Pi is known to be irrational and its decimal expansion therefore does not terminate or repeat. But it is sometimes helpful to have good approximations to π.
What you have to do this month is to choose eight circular objects, to measure its circumference and its diameter and to divide these quantities. The photography or the drawing of the object, both measures and the result of the division is what you have to give to the teacher in a table.
Example:
hola profesor soy danilo malagon de 1ºC:
ResponderEliminar1º circumference diameter ratio
candle 21'66 cm 6'9 cm 21'66/6'9=3'1391 (ratio)
2º circumference diameter ratio
watch 8'48 cm 2'7 cm 8'48/2'7=3'1407 cm (ratio)
3ºcircumference diameter ratio
ring 5'96 cm 1'9 cm 5'96/1'9=3'136 (ratio)
4º circumference diameter ratio
glass 23'55 cm 7.5 cm 23'55/7'5= 3'14 cm (ratio)
5º circumference diameter ratio
plug 6'9 cm 2'2 cm 6'9/2'2= 3'13636363... cm (ratio)
6º circumference diameter ratio
red bull can 15'7 5 cm 15'7/5= 3'14 cm
7ºcircumference diameter ratio
fish food 11'6 cm 3'7 cm 11'6/3'7= 3'135 cm
8ºcircumference diameter ratio
disc 36'7 cm 11'7 cm 36'7/11'7=3'136 cm
Hola soy José Antonio de 1º C y esta es mi respuesta:
ResponderEliminarImages Circunference Diameter Ratio(C/D)
Toilet paper 19,4/ 6,2/ 2
Red Bull 15,7/ 5/ 3,4
Candle 21,98/ 7/ 3,5
Cup 20,41/ 6,5/ 3,14
Glass 22,6/ 7,2/ 3,13
Plug 6,9/ 2,2/ 3,13
Ring 6,28/ 2/ 3,14
Hola soy Victor Guerra de 1ºC
ResponderEliminarSolución:
Plato G. Circ.72,4 Dia.23 Rat.3,147
Cenicero Circ.26 Dia.8,2 Rat.3,170
Plato P. Circ.48,5 Dia.15,5 Rat.3,129
Vaso Cir.20 Dia.6,3 Rat.3,174
C.D. Cir.38 Dia.12 Rat.3,166
Tapadera Cir.81,4 Dia.26 Rat.3,130
Lata Cir.51,4 Dia.16,2 Rat.3,172
Tapón Cir.15,8 Dia.5 Rat.3,16
José Carlos López 1ºC
ResponderEliminar1º problema
195,7/62,5= 3,1312
195,1/62,1=3,141201095
29,4/9,4=3,127659574
29,2/9,3=3,139784946
2º problema
(El orden es de mas alejado a más próximo)
1º 3
2º 3,09
3º 3,125
4º 3,160493827
5º 3,14084507
6º 3,1416
7º 3,1415926
8º 3,1415926536
9º 3,1415926535897932
cosas /circunferencia/diámetro/proporción
ResponderEliminarmoneda 20 cent-6.908 cm-2.2 cm-3.14
base caja-26.69 cm-8.5 cm-3.14
base de vaso-16.328 cm-5.2 cm-3.14
base de pila-4.396 cm-1.4 cm-3.14
tapón-9.42 cm-3 cm-3.14
rollo de celo-12.874 cm-4.1 cm-3.14
lente cámara-6.28 cm-2 cm-3.14
JORGE GÓMEZ FERNÁNDEZ 1ºC
Soy Alonso Márquez Romero de 4ºA
ResponderEliminarObjeto Circunferencia Diámetro Resultado
Vaso de 14.13 cm 4.5 cm 3.14 cm
chupito
CD 37.68 cm 12 cm 3.14 cm
Tapón
botella 7.85 cm 2.5 cm 3.14 cm
Rollo
servilleta 23.55 cm 7.5 cm 3.14 cm
Florero 47.1 cm 15 cm 3.14 cm
Lámpara 18.84 cm 6 cm 3.14 cm
Papelera 50.24 cm 16 cm 3.14 cm
Pintalabios 4.71 cm 1.5 cm 3.14 cm
Circunferiencia Diámetro Radio
ResponderEliminar----------------------------------------
67,9 34,7 1,95677
93,5 52,8 1,77083
25,6 8,3 3,08434
35,6 14,7 2,42177
75,9 57,1 1,32925
23,1 9,96 2,31928
46,2 17,8 2,59551
30,8 10,4 2,96154
Andrés González Ruiz 4ºA
ResponderEliminarSacapuntas D=2.5 C=9 R=3'6
Chapa D=4.5 C=14 R=3'1
Pulsera D=6.5 C=21 R=3'23
Vaso D=6.5 C=20 R=3'07
CD D=12 C=39 R=3'25
Botella D=6 C=20 R=3'33
Sombrero D=28 C=100 R=3'57
Juguete circ. D=5'5 C=20 R=3'63
Desodorante D=4 C=14 R=3'5
Peluche D=9 C=29'5 R=3'27
Raúl López Martín 4ºA
ResponderEliminarLong / Diámetro
Lapicero 22'5 / 6´9 = 3'26
Lámpara circular 82'4 / 25'6 = 3'21
Base de botella 21'5 / 6'7 = 3'2
Moneda 8'1 / 2'3 = 3'52
Tazón 42'1 / 13'2 = 3'18
Cenicero 48'1 / 14'5 = 3'31
Reloj 28'2 / 8'5 = 3'31
(esfera)
Base de una copa 21'3 / 6'4 = 3'32