Question 1:
The formula for the area of a circle is A = πr^2.
Given that the radius, r, is 9.5 cm, we can plug this into the formula:
A = 3.14 * 9.5^2
A = 3.14 * 90.25
A = 283.235
Rounded to the nearest tenth, the area of the circle is 283.2 cm^2.
Therefore, the closest answer choice is D) 283.4 cm^2.
Question 2:
The formula for the circumference of a circle is C = 2πr.
Given that the radius, r, is 9.5 cm, we can plug this into the formula:
C = 2 * 3.14 * 9.5
C = 2 * 3.14 * 9.5
C = 59.69
Rounded to the nearest tenth, the circumference of the circle is 59.7 cm.
Therefore, the correct answer is B) 59.7 cm.
Calculate Area and Circumference
Suppose that the radius of a circle is 9.5 cm.
Question 1
To the nearest tenth, what is the area of the circle? (Use 3.14 for
.)
Responses
A 29.8
29.8 cm 2
B 59.7
59.7 cm 2
C 173.5
173.5 cm 2
D 283.4
283.4 cm 2
Question 2
To the nearest tenth, what is the circumference of the circle? (Use 3.14 for
.)
Responses
A 29.8 cm29.8 cm
B 59.7 cm59.7 cm
C 151.2 cm151.2 cm
D 167.8 cm
1 answer