Area of a Circle from Diameter or Radius

What is the radius of this circle?

• 18
• 10
• 9
• 8

What is the diameter of this circle?

• 3.5
• 3
• 5
• 7

Find the area of the circle

• 43.96
• 153.86
• 87.82
• 307.72

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm

If the diameter of a circle is 50 yards, the radius is _____

• 100 yards
• 25 yards
• 150 yards
• 15 yards

What is the area of a circle with a diameter of 10 cm ?

• 31.4 cm²
• 78.5 cm²
• 15.7 cm²
• 314 cm²

What is the area of a circle with a radius of 21 cm?

• 1384.74 cm²
• 2142.12 cm²
• 4348.08 cm²
• 1289.12 cm²

Shring's dining room table is round and has a radius of 4.5 feet. What is the tabletop's area?

• 63.585 ft²
• 68.345 ft²
• 64.585 ft²
• 61.345 ft²

Marisa purchases a pot for her father's garden. The diameter of the bottom of the pot is 18 cm. What is the area of the pot's bottom? (Round to the nearest whole number.)

• 28 cm²
• 57 cm²
• 254 cm²
• 1017 cm²

The largest cookie ever baked measured a radius of 51 feet.  Which of these is the closest to the area of the cookie?  

• 2601 ft²
• 8167 ft²
• 2042 ft²
• 162 ft²