If the diameter of a circle is half of a yard then its radius is how many inches?
diameter = 1/2 yard = 36/2 = 18 inches
radius = 18/2 = ? inches
How many inches are in a yard? That number divided by two because radius is diameter divided by 2
r = d/2
To find the radius of a circle when given its diameter, you need to divide the diameter by 2.
In this case, the diameter is half of a yard. Since 1 yard is equal to 36 inches, half of a yard is equal to 18 inches. So, the diameter of the circle is 18 inches.
To find the radius, you divide the diameter by 2: 18 inches / 2 = 9 inches.
Therefore, the radius of the circle is 9 inches.