Circumference and Area of a Circle

Find the circumference of a circle with a radius of 12.5 mm .

• 37.68mm

• 18.84mm

• 78.5mm

• none of the above

What is the formula for finding the circumference for a circle with just the radius?

•  2*π*r

• 1/2 b*h

• a+b/2*h

• I do not know

The radius of this pizza is 9 ½ in. What is the approximate area of the pizza?

• 81 in²

• 29.83 in²

• 59 ⅔ in²

• 283 ½ in²

Find the area of the circle in the picture.

• 34.54 in²

• 69.08 in²

• 379.94 in²

• 254.34 in²

What is the approximate area of the given circle?

• 94.8 cm²

• 47.4 cm²

• 716 cm²

• 2863.8 cm²

The diameter of a quarter is 24.26 mm. What is closest to the circumference of the outer edge of the quarter? Use 3.14 for Pi.

• 76.18 mm

• 38.01 mm

• 463 mm

• 1,848 mm

The circumference of a circle is 37.68 yds. What is the diameter? Use 3.14 for Pi.

• 118.3 yds

• 6 yds

• 12 yds

• 59.5 yds

The circumference of a circle is 28.26 cm. What is closest to the area of the circle.

• 254.34 cm²

• 14.13 cm²

• 63.6 cm²

The radius is 8 inches.  What is the circumference?

• 50.24 inches

• 25.12 inches

• 12.56 inches

• 200.96 inches

Find the circumference of the circle

• 87.82

• 153.86

• 43.96

• 307.72