steviedude316
19.02.2020 •
Mathematics
GET NAMED BRAINLIEST AND ANSWER THE RIGHT ANSWER AND GET A THANKS AND GET 30 POINTS
1.
Given a circle with a circumference of 10cm, which equation shows how the relationship between a circumference and its diameter can be used to find π
?
Question 1 options:
a. π=1/10d
b. π=d/10
c. π = 10d
d. π=10/d
2. The radius of a circle is 15. Using π
, which equation expresses the ratio of the circumference to the diameter of a circle?
Question 2 options:
a.C=15π/r
b.C/15=π
c. C=/r30π
d. C/30=π
Solved
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Ответ:
#i. π = 10/d
#ii. C/30=π
Step-by-step explanation:
#a. We are given;
The circumference of a circle as 10 cmWe are required to show how the relationship between the circumference and the diameter can be used to find π.
we know that the circumference of a circle is given by;
Circumference = πd
But, circumference is 10 cm
Therefore;
10 cm = πd
Dividing both sides by d, then;
π = 10/d
#b. we are given;
We are given;
Radius of a circle = 15
We are supposed to express the ratio of circumference to the diameter;
We need to know that;
Diameter = 2 × radius
= 2r
Circumference = πd or
= 2πr
Therefore, the ratio of circumference to the diameter will be;
C=2πr
d=2r
C/d = π
But d =30
Thus; C/30 =π
Ответ: