Area of a Sector Teach-Back Activity

The radius of the circle is 11cm. What is the area of the sector bounded by an 180 degree arc?

• 60 cm

• 60.5 sq centimeters

• 60.5 centimeters

• 70.5 meters

What is a sector?

• a mesure of distance from the center of any circular object to its outermost edge or boundary

• in mathematics an “arc” is a smooth curve joining two endpoints

• a portion or part of a circle that is composed of an arc and its two radii

• total space taken up by a flat (2-D) surface or shape of an object

The radius of this circle is 15.5 centimeters. What is the area of a sector bounded by a 60 degree arc?

• 40.04 sq centimeters

• 40 sq centimeters

• 41 centimeters

• 40 kilometers

The radius of a circle is 6cm. What is the area of sector bounded by a 70 degree arc?

• 8.5 sq centimeters

• 9 sq centimeters

• 12 sq centimeters

• 7 sq centimeters

The radius of a circle is 18cm. What is the area of a sector bounded by a 22 degree arc?

• 19.5 centimeters

• 20 sq centimeters

• 19.8 sq centimeters

• 24 sq centimeters

What is the area of a sector bounded by a 190 arc? The radius of a circle is 4cm. *Round to the nearest tenth

• 8.44 sq centimeters

• 8.4 sq centimeters

• 9 sq centimeters

• 8 meters

If the radius of a circle is 19cm, what's the area of a sector bounded by an 180 degree arc?

• 195.5 sq centimeters

• 181 sq centimeters

• 200 sq centimeters

• 180.5 sq centimeters

What formula is this used to find?

• Find the Area

• Find the Hypotenuse

• Area of a Sector

• Finding the degree of an arc

What's the area of the sector bounded by a 66 degree arc? If the radius is 22cm. *Round to the nearest tenth

• 88.73 sq centimeters

• 88.7 sq centimeters

• 88.8 centimeters

• 99 sq centimeters

What is the purpose of finding the Area of a Sector?

• Understanding the area of a sector helps us study the properties of circles and their parts. It allows us to compare the area of the sector to the area of the whole circle.

• To know what that sector equals to figure out other problems

• Understanding the Area of a Sector helps us understand the radius "radii"

• To understand to concept of Area of a Sector