Calculator Buttons
What mode should your calculator be in when working with circles?
Degrees
What is the area of a sector with radius 3 cm and angle 100 degrees?
7.854
What is the area of a circle with radius 9 cm?
254.469
A water sprinkler covers a circular area with a diameter of 20 feet. If it is set to cover only an arc measuring 120 degrees, what is closest to the area, in square feet, that the sprinkler will cover?
105
Where is the pi button on your calculator?
Point to the correct button
What is the area of a sector with radius 10 in and angle 30 degrees?
26.180
What is the area of a circle with radius 25 mm?
1963.495
Diego waters his lawn with a sprinkler that sprays water in a circular pattern at a distance of 15 feet from the sprinkler. The sprinkler rotates through an angle of 300 degrees.
What is the area of the lawn, to the nearest square foot, that receives water from this sprinkler?
589
How can you check to see if your calculator is in degrees?
Mode Button
What is the area of a sector with diameter 12 m and angle 150 degrees?
47.124
What is the area of a circle with diameter 40 m?
1256.637
A spotlight has a beam that travels 100 feet and covers an area intercepted by an 84 degree angle.
To the nearest square foot, what area does the spotlight cover?
7,330