Circumference

Front

What is the definition of circumference?

Back

The circumference is the distance around a circle.

Front

What is the formula for calculating the circumference of a circle?

Back

The formula is C = 2πr or C = πd, where r is the radius and d is the diameter.

Front

If the radius of a circle is 5 cm, what is its circumference in terms of Pi?

Back

C = 10π cm.

Front

What does the diameter of a circle represent?

Back

The diameter is the distance across the circle through its center, equal to twice the radius.

Front

If the diameter of a circle is 14 cm, what is the radius?

Back

The radius is 7 cm.

Front

What is the relationship between radius and diameter?

Back

The diameter is twice the radius (d = 2r).

Front

How do you convert diameter to radius?

Back

To convert diameter to radius, divide the diameter by 2.

Front

What is the circumference of a circle with a diameter of 12 inches in terms of Pi?

Back

C = 12π inches.

Front

If a circle has a circumference of 31.4 cm, what is its diameter?

Back

The diameter is 10 cm (C = πd, so d = C/π).

Front

What is the perimeter of a rectangle?

Back

The perimeter is the total distance around the rectangle, calculated as P = 2(length + width).