Area of Circle

What is the formula for area of a circle given the radius?

• A = πr2

• A = πd

• A = πr²

• A = 2πr

A circular flower bed has a diameter of 10 yards , what is the area of the bed?

• 98^2 yards

• 56^2 yards

• 63.9^2 yards

• 78.5^2 yards

The radius is always two times the diameter.

• TRUE

• FALSE

The radius of a circular cake is 15cm long, how long is the diameter?

• 225cm

• 30cm

• 7.5cm

• 1.5cm

A cell phone mast has a range of 7miles in all directions. What is the area covered by 1 mass. Using pi as 3.14

• 153.9^2 miles

• 135^2 miles

• 120^2 miles

• 110.2^2 miles

A line from the centre point to the edge of a circle.

• radio

• diameter

• radius

• circumference

How many square inches of crust would it take to cover the bottom of a pie with a 6 inch diameter? Using pi as 3.14

• 28.3^2 inches

• 113^2 inches

• 40^2 inches

• 56^2 inches

The line that goes from one edge of the circle to another and crosses the center point.

• radius

• diameter

• circumference

• center