circle questions

Jeff drew a circle inside a square, as shown below.  Which method can Jeff use to find the area of the square not covered by the circle?

• Subtract the area of the circle from the area of the square.
• Subtract the area of the square from the area of the circle.
• Subtract 1/4 the area of the square from the area of the circle.
• Subtract 1/4 the area of the circle from the area of the square.

Match the formulas to the measurements indicated.

• d/2

• To find the circumference of a circle use:

• To find the diameter of a circle use:

• 2r

• To find the radius of the circle use:

• To find the area of a circle use:

Drag each part of a circle and drop it on top of the color that represents it in the picture

• Yellow

• Area
• Red

• Radius

• Green

• Diameter
• Blue

• Circumference

Use the circle shown to match the following

• Diameter

• 6 cm

• Radius

• 37.68 cm

• Circumference

• 12 cm

• Area

• 113.04 cm²

Find the area of this Semicircle with a diameter of 18 cm

• 254.34 cm²

• 127.17 cm²

• 56.52 cm²

• 28.26 cm²