Understanding the Area of a Circle

What is the definition of a circle?

• A three-dimensional shape

• A plain figure whose boundaries are a circumference

• A figure with only one side

• A figure with no boundaries

How is the area of a circle measured?

• In cubic units

• In linear units

• In square units

• In circular units

What is the center of a circle?

• The point on the circumference

• The point inside the circle

• The point equidistant from all points on the circumference

• The point outside the circle

What is the formula to calculate the area of a circle?

• Pi multiplied by the diameter

• Pi multiplied by the radius

• Pi multiplied by the circumference

• Pi multiplied by the radius squared

What is the approximate value of Pi used in everyday calculations?

• 3.13

• 3.14

• 3.15

• 3.12

If the radius of a circle is 6 inches, what is the area?

• 18.84 square inches

• 36 square inches

• 113.04 square inches

• 72 square inches

What is the radius of Anna's round table?

• 50 inches

• 40 inches

• 30 inches

• 60 inches

How much fabric does Anna need for her tablecloth?

• 8000 square inches

• 7500 square inches

• 7700 square inches

• 7850 square inches

What is the first step in calculating the area of Anna's table?

• Square the diameter

• Square the radius

• Multiply the diameter by Pi

• Multiply the radius by Pi

What should you do after squaring the radius to find the area of a circle?

• Divide by Pi

• Multiply by Pi

• Subtract Pi

• Multiply by the diameter