Circumference And Area Of Circle Quiz! Trivia

The circumference of a circle can be found using the formula C = 2πr, where r is the radius of the circle. In this case, the radius is 30.9 centimeters. Plugging this value into the formula, we get C = 2π(30.9) = 61.8π. To find the circumference rounded to the nearest tenth, we need to calculate the value of 61.8π. Using the approximation of π as 3.14, we get 61.8 * 3.14 = 194.1. Therefore, the correct answer is 194.1.

To find the circumference of a circle, we use the formula C = 2πr, where r is the radius of the circle. In this case, the radius is given as 5.6 meters. Plugging this value into the formula, we get C = 2π(5.6) = 11.2π. To round to the nearest tenth, we need to calculate the value of 11.2π. Using the approximation of π as 3.14, we can calculate 11.2π as 11.2 * 3.14 = 35.168. Rounding this to the nearest tenth gives us 35.2, which is the correct answer.

The area of a circle can be calculated using the formula A = πr^2, where A is the area and r is the radius. In this case, the radius is approximately 14 centimeters. Plugging this value into the formula, we get A = π(14^2) = 615.44. Rounding to the nearest tenth, the area of each cookie is approximately 615.4 square centimeters.

A sprinkler can spray water 10 feet in all directions. The area that the sprinkler can water can be calculated using the formula for the area of a circle, which is πr^2, where r is the radius of the circle. In this case, the radius is 10 feet, so the area is π(10^2) = π(100) = 100π. Since we are asked to round to the nearest tenth, we can use the approximation π ≈ 3.14. Therefore, the area is approximately 100(3.14) = 314.0 sq.feet.

The area of a circle can be found using the formula A = πr^2, where r is the radius of the circle. In this case, the diameter is given as 6.8 meters, so the radius would be half of that, which is 3.4 meters. Plugging this value into the formula, we get A = π(3.4)^2 = 36.316. Rounded to the nearest tenth, the area of the circle is 36.3 square meters.

The formula to calculate the area of a circle is A = πr², where A is the area and r is the radius. In this case, the radius is given as 4 meters. Plugging this value into the formula, we get A = π(4)² = 16π. To find the approximate value, we can use the approximation π ≈ 3.14. Therefore, the area is approximately 16(3.14) = 50.24. Rounding this to the nearest tenth gives us 50.2, which is the correct answer.

The formula to calculate the area of a circle is A = πr^2, where A is the area and r is the radius. In this case, the radius is given as 12 cm. Plugging this value into the formula, we get A = π(12)^2. Evaluating this expression gives us A = 144π. To round to the nearest tenth, we need to calculate the approximate value of π and multiply it by 144. Rounding π to 3.14, we get A ≈ 452.16. Rounding this to the nearest tenth gives us the answer of 452.2 square centimeters.

The area of a circle is given by the formula

A=πr2

, where (r) is the radius of the circle. Given that the diameter of the circle is 25 yards, the radius would be half of the diameter, which is (12.5) yards.

Substituting the radius into the formula, we get:

A=π(12.5)2=490.8738521234052

Rounding to the nearest tenth, the area of the circle is approximately 490.9 square yards.

The formula to calculate the area of a half circle is (π * r^2) / 2, where r is the radius. In this question, the diameter is given as 8 m, so the radius would be half of that, which is 4 m. Plugging this value into the formula, we get (π * 4^2) / 2 = (π * 16) / 2 = 8π / 2 = 4π. Rounding this to the nearest tenth gives approximately 12.6. Therefore, the correct answer is 25.1.

The correct answer is 33.2. To find the area of a circle, we use the formula A = πr^2, where A is the area and r is the radius. Plugging in the given radius of 3.25, we get A = 3.14 * (3.25)^2 = 3.14 * 10.5625 = 33.17875. Rounding this to the nearest tenth gives us 33.2.

The formula for the circumference of a circle is 2πr, where r is the radius of the circle. Substituting the given value of radius = 51.25 inches in the formula gives: 2 x π x 51.25 = 322.04 inches Rounding off to the nearest tenth gives 322.0 inches

The formula for the area of a circle is πr², where r is the radius of the circle. Substituting the given value of radius = 13.8 m in the formula gives: π x 13.8 x 13.8 = 598.34 sq m Rounding off to the nearest tenth gives 600 sq m

John's pizza slice is one-eighth of the total pizza circumference, as the pizza was cut into 8 equal pieces. Since John's crust measured 5 inches, his slice extends one-eighth of the way around the pizza, making his entire slice length 5 inches.

To find the area of a circle, you can use the formula:



Area = π * (radius)^2



The diameter of the circle is 19 mm, and the radius is half of the diameter, so the radius is 19 mm / 2 = 9.5 mm.



Now, plug this radius into the formula and round the result to the nearest tenth:



Area = π * (9.5 mm)^2 ≈ 283.98 mm²



Rounded to the nearest tenth, the area of the circle is approximately 284 mm² rounded to the nearest tenth.