sere50
31.01.2020 •
Mathematics
Im sorry for so many questions but i need badly.
the circumference of a circle with the diameter of 5 cm is 15.7 cm. what is the ratio of thecircumference to the diameter?
the circumference of a circle with the diameter of 5 cm is 15.7 cm. what is the ratio of thecircumference to the diameter?
the circumference of a circle is 16π inches. show how you can use this information to calculate the same circle’s area.
again im sorry for so many question. but me with this.
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Ответ:
pi=circumference/diameter
that is how they got pi
in this question it woul be 15.7/5 which would be 3.14,
c=2pir
a=pir^2
c=2pir=16pi
divide both sides by 2pi
r=8
a=pir^2
a=pi8^2
a=pi64
a=64pi in²
Ответ: