Circle Area & Sector Area

Front

What is the formula for the area of a sector?

Back

Area of a sector = (θ/360) × πr², where θ is the central angle in degrees and r is the radius.

Tags

CCSS.HSG.C.B.5

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius.

Tags

CCSS.7.G.B.4

Front

What is the value of pi (π)?

Back

π is approximately 3.14.

Tags

CCSS.HSG.GMD.A.1

Front

How do you find the radius if the diameter is given?

Back

Radius = Diameter / 2.

Tags

CCSS.7.G.B.4

Front

What is arc length?

Back

Arc length is the distance along the edge of a circle between two points.

Tags

CCSS.HSG.C.B.5

Front

What is the formula for arc length?

Back

Arc length = (θ/360) × 2πr, where θ is the central angle in degrees and r is the radius.

Tags

CCSS.HSG.C.B.5

Front

If the radius of a circle is 6 inches, what is the area of the circle?

Back

Area = π(6)² = 113.04 in².

Tags

CCSS.7.G.B.4

Front

What is a sector of a circle?

Back

A sector is a portion of a circle enclosed by two radii and the arc between them.

Front

How do you calculate the area of a shaded sector given the radius and central angle?

Back

Area of shaded sector = (θ/360) × πr².

Tags

CCSS.HSG.C.B.5

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius.

Tags

CCSS.7.G.B.4