Geometry

Front

What is the area of a circle?

Back

The area of a circle is calculated using the formula A=πr², where r is the radius.

Tags

CCSS.7.G.B.4

Front

What is the formula for the area of a circle?

Back

A=πr²

Tags

CCSS.7.G.B.4

Front

What is the formula for the circumference of a circle?

Back

C=πd, where d is the diameter.

Tags

CCSS.7.G.B.4

Front

What is the diameter of a circle?

Back

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

Tags

CCSS.HSG.C.A.2

Front

What is the radius of a circle?

Back

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

Front

How do you calculate the area of a circle if the radius is 4 cm?

Back

Using the formula A=πr², the area is A=π(4)² = 16π cm², approximately 50.27 cm².

Tags

CCSS.7.G.B.4

Front

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

Back

Using the formula C=πd, the diameter d can be calculated as d=C/π = 31.4/π ≈ 10 cm.

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius, or d=2r.

Tags

CCSS.7.G.B.4

Front

What is π (pi)?

Back

π (pi) is a mathematical constant approximately equal to 3.14159, representing the ratio of a circle's circumference to its diameter.

Tags

CCSS.HSG.GMD.A.1

Front

How do you find the circumference if the radius is 4 cm?

Back

Using the formula C=2πr, the circumference is C=2π(4) = 8π cm, approximately 25.13 cm.

Tags

CCSS.7.G.B.4