Question

The circumference of a dinner plate is 19.4 cm. What is its radius ?

Answer 1

To find the radius of a dinner plate with a circumference of 19.4 cm, use the formula C = 2πr and solve for r by dividing both sides of the equation by 2π.

Step-by-step explanation:

To find the radius of a dinner plate, you can use the formula for the circumference of a circle: C = 2πr, where C is the circumference and r is the radius. Since you have the circumference given as 19.4 cm, you can plug it into the formula and solve for r. Here are the steps:

1. Divide both sides of the equation by 2π: C/2π = r
2. Substitute the given value for C: r = 19.4 cm / 2π
3. Use 3.14 as an approximation for π and calculate the radius: r ≈ 19.4 cm / (2 × 3.14)

By performing the calculations, the approximate radius of the dinner plate is 3.09 cm.