Exploring Area Notes and Rational Expressions

The video tutorial covers the calculation of the area of circles, starting with an introduction to the concept and formula for area in terms of pi. It then demonstrates how to use a calculator to find the area to the nearest hundredth. The tutorial concludes with instructions for classwork and homework, emphasizing the importance of following steps and rounding correctly.

What is the formula for the area of a circle?

• Area = radius * radius / pi

• Area = pi * diameter

• Area = 2 * pi * radius

• Area = pi * radius squared

How do you calculate the area of a circle with a radius of 4?

• 8 pi square units

• 64 pi square units

• 16 pi square units

• 4 pi square units

If the diameter of a circle is 16 meters, what is the radius used in the area formula?

• 16 meters

• 8 meters

• 4 meters

• 32 meters

What is the area of a circle with a radius of 8 meters in terms of pi?

• 8 pi meters squared

• 32 pi meters squared

• 64 pi meters squared

• 16 pi meters squared

How do you calculate the area of a circle to the nearest hundredth?

• Subtract pi from the radius squared

• Multiply diameter by pi

• Use the pi key and square the radius

• Add pi to the radius squared

What is the area of a circle with a radius of 2.5 inches, rounded to the nearest hundredth?

• 19.64 square inches

• 19.65 square inches

• 19.62 square inches

• 19.63 square inches

What should you do if you finish the classwork early?

• Leave the class

• Start the homework

• Work on the circle coloring page

• Review the notes again

For the first six questions on area, what formula should you use?

• C = pi * diameter

• A = pi * diameter squared

• A = pi * radius squared

• C = 2 * pi * radius

How should you round off your answers for the area calculations in the homework?

• To the nearest unit

• To the nearest hundredth

• To the nearest tenth

• Do not round off

What is the correct way to handle units in your final answer for area calculations?

• Both the number and the units should be squared

• Only the pi should be squared

• Only the number should be squared

• Only the units should be squared