Applying Circumference

Front

What is the formula for the circumference of a circle?

Back

The circumference (C) of a circle is calculated using the formula: C = πd, where d is the diameter of the circle.

Front

What is the value of π (Pi) used in calculations?

Back

The value of π (Pi) is approximately 3.14.

Front

If a circle has a diameter of 10 cm, what is its circumference?

Back

C = πd = 3.14 * 10 = 31.4 cm.

Front

What is the relationship between diameter and radius?

Back

The radius (r) is half of the diameter (d): r = d/2.

Front

How do you convert feet to inches?

Back

To convert feet to inches, multiply the number of feet by 12 (since 1 foot = 12 inches).

Front

What is the circumference of a circle with a radius of 5 cm?

Back

C = 2πr = 2 * 3.14 * 5 = 31.4 cm.

Front

How many inches are in 100 feet?

Back

100 feet = 100 * 12 = 1200 inches.

Front

If a circle has a radius of 4.3 meters, what is its circumference?

Back

C = 2πr = 2 * 3.14 * 4.3 ≈ 27.0 meters.

Front

What is the approximate difference in circumferences of two circles with diameters 4.5 cm and 24 cm?

Back

C1 = π * 4.5 ≈ 14.13 cm; C2 = π * 24 ≈ 75.4 cm; Difference ≈ 75.4 - 14.13 ≈ 61 cm.

Front

How do you calculate the number of revolutions a wheel makes?

Back

Number of revolutions = Distance traveled / Circumference of the wheel.