Given the diameter, find the area of a circle

The video tutorial explains how to calculate the area of a circle. It emphasizes the importance of knowing the formula, which is the area equals pi times the radius squared. The teacher guides students through determining the radius from a given diameter, calculating the area using a calculator, and rounding the result to the nearest tenth. The tutorial concludes with a reminder to express the area in square inches.

Why is it important to memorize the formula for the area of a circle?

• Because it is not provided during exams.

• Because it is frequently used in geometry problems.

• Because it is the only formula needed for all shapes.

• Because it is a complex formula.

What is the first step in finding the area of a circle when given the diameter?

• Multiply the diameter by pi.

• Convert the diameter to the radius.

• Use the diameter directly in the formula.

• Square the diameter.

If the diameter of a circle is 24 inches, what is the radius?

• 24 inches

• 6 inches

• 48 inches

• 12 inches

When calculating the area of a circle, why should you avoid rounding pi to 3.14?

• It can lead to a less accurate result.

• It is unnecessary for small circles.

• It makes the calculation more complex.

• It is not allowed in exams.

What is the correct unit for the area of a circle if the radius is given in inches?

• Cubic inches

• Square inches

• Inches

• Inches per square