C = 2(pi)r and C = d(pi) are the formulas for finding the _____________ of a circle. Responses A RadiusRadius B AreaArea C CircumferenceCircumference Question 2 What is the radius of the circle in the example? Responses A 3 cm3 cm B 5 cm5 cm C 7 cm7 cm Question 3 What is the circumference of the circle in the example? Responses A 2π2π B 4π4π C 6π
C
What is the radius of the circle in the example?
Responses
A 3 cm3 cm
B 5 cm5 cm
C 7 cm7 cm
Question 3
What is the circumference of the circle in the example?
Responses
A 2π2π
B 4π4π
C 6π
The radius of the circle is 5 cm (B) and the circumference of the circle is 10π or 10π cm (B).
The area of a circle is 615.44 . What is the diameter of the circle? Use 3.14 for π. Responses A 14 in14 in B 18 in18 in C 20 in20 in D 24 in24 in E 28 in
To find the diameter of the circle, you can use the formula A = πr^2, where A is the area of the circle and r is the radius. Since the area is given as 615.44, you can first find the radius using the formula and then double it to get the diameter.
615.44 = 3.14 * r^2
r^2 = 615.44 / 3.14
r^2 ≈ 195.93
r ≈ √195.93
r ≈ 13.99
So, the radius is approximately 13.99. The diameter will be twice the radius.
Diameter = 2 * 13.99
Diameter ≈ 27.98
Therefore, the diameter of the circle is approximately 28 inches (E).
Roman bought a pepperoni pizza that had a diameter of 35 inches. Which measurement is closest to the circumference of the pizza in inches? Responses A 54.95 inches54.95 inches B 9,481.2 inches9,481.2 inches C 109.9 inches109.9 inches D 124.56 inches
To find the circumference of the pizza, you can use the formula C = πd, where C is the circumference, π is approximately 3.14, and d is the diameter of the circle (which is 35 inches).
C = 3.14 * 35
C ≈ 109.9
Therefore, the circumference of the pizza is approximately 109.9 inches (C).