Question
What is the circumference of a circle with a radius of 2.5 feet? Estimate the circumference to the tenths place using 3.14 for π
.(1 point)
Responses
15.6 feet
15.6 feet
16 feet
16 feet
7.85 feet
7.85 feet
15.7 feet
The correct answer is 15.7 feet.
What is the area of a circle with a radius of 12 feet? Estimate the area to the hundredths place using 3.14 for π
.(1 point)
Responses
452.16 square feet
452.16 square feet
113.04 square feet
113.04 square feet
452.2 square feet
452.2 square feet
75.4 square feet
The correct answer is 452.16 square feet.
What is the area of a circle with a diameter of 10 millimeters? Estimate the area to the tenths place using 3.14 for π
.(1 point)
Responses
314 square mm
314 square mm
79 square mm
79 square mm
15.7 square mm
15.7 square mm
78.5 square mm
The correct answer is 78.5 square mm.
To find the circumference of a circle, you can use the formula: circumference = 2πr, where π is the mathematical constant pi (approximately 3.14) and r is the radius of the circle.
In this case, the radius is given as 2.5 feet. To estimate the circumference to the tenths place, use the formula:
circumference ≈ 2 * 3.14 * 2.5
Calculating this, you get:
circumference ≈ 15.7 feet
Therefore, the estimated circumference of a circle with a radius of 2.5 feet is 15.7 feet to the tenths place.