AREA OF A CIRCLE

Which figure has a formula for finding area that can be used to derive a

formula of a circle?

• triangle

• trapezoid

• parallelogram

   A circular plate has a radius of 25 cm. Find the area.

(a)  

What is the circumference of this circle?

• 17.3 mm

• 23.7 mm

• 95 mm

• 34.54 mm

 $4^2=$  

•  $4\times4$  

•  $4-4$  

•  $4\div4$  

•  $4+4$  

Which BEST describes segment AB?

• chord
• secant
• tangent
• diameter

Ms. Catall is using a compass to find her way out of the woods. The compass has a radius of 6 centimeters. What is the compass's area?

• 49.2 cm²

• 45.6 cm²

• 50.24 cm²

• 113.04 cm²

Ms. Catall is using a compass to find her way out of the woods. The compass has a radius of 4 centimeters. What is the compass's area?

• 49.2 cm²
• 45.6 cm²
• 50.24 cm²
• 55.9 cm²

A cruise ship has a large, circular window. It has a diameter of 8 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 50.27 m²

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm

How much grass is needed to fill the entire circular lawn?

• 4,418 steps²
• 235 steps²
• 5,625 steps²
• 740 steps²