Circumference

Front

What is the formula to calculate the circumference of a circle?

Back

C = π·d, where C is the circumference and d is the diameter.

Tags

CCSS.7.G.B.4

Front

What does the symbol π (Pi) represent?

Back

Pi is a mathematical constant approximately equal to 3.14, representing the ratio of the circumference of a circle to its diameter.

Tags

CCSS.HSG.GMD.A.1

Front

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

Back

C = π·d = 3.14 × 10 cm = 31.4 cm.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

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

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 5 cm, what is the circumference?

Back

C = 2·π·r = 2 × 3.14 × 5 cm = 31.4 cm.

Tags

CCSS.7.G.B.4

Front

What is the diameter of a circle with a circumference of 31.4 cm?

Back

d = C/π = 31.4 cm / 3.14 = 10 cm.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a radius of 7 cm?

Back

C = 2·π·r = 2 × 3.14 × 7 cm = 43.96 cm.

Tags

CCSS.7.G.B.4

Front

What does C represent in the formula C = π·d?

Back

C represents the circumference of the circle.

Tags

CCSS.HSG.C.B.5

Front

What is the circumference of a circle with a diameter of 20 cm?

Back

C = π·d = 3.14 × 20 cm = 62.8 cm.

Tags

CCSS.7.G.B.4

Front

What is the term for the distance around a circle?

Back

Circumference.

Tags

CCSS.7.G.B.4