Area and Volume of a Prism

The video tutorial explains how to find the radius of a circle when given the area. It starts with a problem involving a sprinkler watering a circular area of 1600 Pi square meters. The tutorial walks through the formula for the area of a circle, A = π * r^2, and demonstrates how to solve for the radius by dividing both sides by π and taking the square root of the result. The instructor uses mental math to find that the radius is 40 meters, concluding with a summary of the method.

What is the area of the circular region being watered by the sprinkler?

• 1600 cubic meters

• 1600 Pi square meters

• 1600 Pi cubic meters

• 1600 square meters

Which formula is used to find the area of a circle?

• Area = π * d

• Area = 2 * π * r^2

• Area = 2 * π * r

• Area = π * r^2

What is the value of π approximately?

• 5.14

• 2.14

• 3.14

• 4.14

After dividing both sides of the equation by π, what is the next step to find the radius?

• Subtract 1600

• Add 1600

• Multiply by π

• Find the square root of 1600

What is the radius of the circular area being watered by the sprinkler?

• 20 meters

• 30 meters

• 40 meters

• 50 meters