Area of Circles, Sectors, Segments, Annuli

is the formula for?

• arc length

• area of a sector

• area of a segment

• arc measure

A cathedral window is built in the shape of a semicircle. If the window is to contain three stained glass sections of EQUAL SIZE, what is the area of the YELLOW SECTOR?

• 3.3 ft²

• 4.5 ft²

• 6.3 ft²

• 7.1 ft²

What is the area of this circle? Leave your answer in terms of pi.

• 25π m²

• 10π m²

• π m²

• 5π m²

What is the area of the shaded region? Leave answers in terms of π.

• ⅜π

• 8/3π

• ⅔π

• 4/3π

Find the arc length.  Leave your answer in terms of π.

• 7/4π

• 7/2π

• 1/8π

• 45π

Name the circle part shown in green

• Sector

• Arc

• Segment

• Radius

What is/are the formula(s) to find the area of a circle?

• πr²

• 2πr

• √π

Find the area of the shaded sector of circle O.  The radius is 6 inches and the central angle is 100°.  Express answer to the nearest tenth of a square inch.

• 9.2 sq. in.

• 10.5 sq. in.

• 31.4 sq. in.

• 38.2 sq. in.

Find the area of the circle.

• 18.84 m²

• 113.1 m²

• 37.68 m²

• 452.16 m²

Find the area of the circle

• 56.52 in²

• 254.47 in²

• 1017.36 in²

• 113.04 in²