Area and Cir

The diameter of a truck wheel is 56.5 inches. What is the circumference of the wheel?

• 177.49 inches

• 167.41 inches

• 157.41 inches

• 187.41 inches

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

• 131.88 cm

• 121.99 cm

• 111.89 cm

• 141.89 cm

What is the circumference of a circle with a diameter of 92 in?

• 288.88 in

• 176.88 in

• 165.88 in

• 186.88 in

What is the circumference of a 12 inch (diameter) pizza?

• 37.68 inches

• 36.68 inches

• 35.68 inches

• 34.68 inches

What is the radius of this circle?

• 18

• 10

• 9

• 8

The rectangle has length 20cm and width 11cm.

The circle has diameter 8cm.

Work out the shaded area.

Give your answer correct to 2 decimal places.

Write the equation of a circle with center (h,k) and radius r.

• x^2 + y^2  = r^2

• (x + h)^2 +  (y + h)^2 = r^2

• (x - h)^2 + (y - k)^2 = r^2

• (x - h)^2 - (h - k)^2 = r

What is the equation of the circle?

• (x+1)^2 + (y +1)^2 = 3

• (x+1)^2 + (y -1)^2 = 3

• (x+1)^2 + (y +1)^2 = 9

• (x-1)^2 + (y -1)^2 = 9

Write the equation of a circle with center (7, 0) with radius 3. 

• (x - ^7)^2 + y^2 = 9

• x^2 + (y -7)^2 = 9

• (x - 7)^2 + y^2 = 3

• x^2 + (y -7)^2 = 3

What is the center of a circle with equation (x-4)² + y² = 5?

• (-4, 0)

• (4, 0)

• (4, 1)

• (-4, 1)