Parts of a Circle

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

What is the diameter of a circle?

Back

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

Tags

CCSS.HSG.C.A.2

Front

What is the circumference of a circle?

Back

The circumference is the total distance around the circle.

Front

How do you calculate the circumference of a circle?

Back

Tags

CCSS.7.G.B.4

Front

What is the formula for the area of a circle?

Back

Tags

CCSS.7.G.B.4

Front

What does π (pi) represent in circle geometry?

Back

π (pi) is a 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 radius of a circle is 2 cm, what is the diameter?

Back

The diameter is 4 cm, since diameter = 2 × radius.

Tags

CCSS.7.G.B.4

Front

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

Back

The radius is 5 cm, since radius = diameter / 2.

Tags

CCSS.7.G.B.4

Front

What is the relationship between radius and diameter?

Back

The diameter is always twice the length of the radius.

Tags

CCSS.7.G.B.4

Front

How do you find the area of a circle with a radius of 3 cm?

Back

Tags

CCSS.7.G.B.4