Area Of Circles

Front

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

Back

Area = πr², where r is the radius of the circle.

Tags

CCSS.7.G.B.4

Front

What is the value of π (pi) to two decimal places?

Back

π ≈ 3.14

Tags

CCSS.HSG.GMD.A.1

Front

If the radius of a circle is 7 cm, what is its area?

Back

Area = π(7)² ≈ 153.86 cm².

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × Radius.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle?

Back

Circumference = 2πr or πd, where d is the diameter.

Tags

CCSS.7.G.B.4

Front

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

Back

Radius = Diameter / 2 = 10 cm / 2 = 5 cm.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 10 inches?

Back

Area = π(10)² ≈ 314.16 in².

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a radius of 15 inches?

Back

Circumference = 2π(15) ≈ 94.25 in.

Tags

CCSS.7.G.B.4

Front

What do you call a line segment that connects two points on the circumference of a circle?

Back

Chord.

Front

What is the term for the longest chord in a circle?

Back

Diameter.