Understanding Sector Area

The video tutorial introduces the concept of sector area, which is a portion of a circle. It explains the formula for calculating sector area, which involves the measure of the central angle and the radius of the circle. The tutorial provides a step-by-step example using a circle with a radius of 8 and a right angle, showing how to simplify the calculation and convert the result to a decimal. The video concludes with a review of the rules for finding sector area, likening it to a slice of pizza.

What is the sector area of a circle?

• The circumference of a circle

• A portion or fraction of a circle

• The diameter of a circle

• The entire area of a circle

Which of the following is needed to calculate the sector area?

• The height of the circle

• The measure of the central angle and the radius

• The diameter of the circle

• The circumference of the circle

In the example, what is the measure of the angle used?

• 60 degrees

• 45 degrees

• 90 degrees

• 180 degrees

What is the radius of the circle in the example?

• 4

• 6

• 8

• 10

How is the fraction of the circle represented in the formula?

• Measure of the angle over 270

• Measure of the angle over 180

• Measure of the angle over 90

• Measure of the angle over 360

What is the area of the sector in terms of pi?

• 32 Pi

• 48 Pi

• 16 Pi

• 64 Pi

How do you convert the sector area to a decimal?

• Multiply by 2

• Add 3.14

• Divide by 3.14

• Multiply by 3.14

What should you remember to include when expressing area?

• No units

• Units only

• Units cubed

• Units squared

What analogy is used to describe sector area?

• A slice of cake

• A slice of pizza

• A slice of pie

• A slice of bread

What is the formula for sector area?

• Measure of the central angle over 270 times pi r squared

• Measure of the central angle over 90 times pi r squared

• Measure of the central angle over 360 times pi r squared

• Measure of the central angle over 180 times pi r squared