The diameter of a circle is a straight line segment that passes through the center of the circle and has both endpoints on the circle. If the diameter of a circle is 100 yards, it means that the distance from one point on the circle, through the center, to the opposite point on the circle is 100 yards. This measurement is twice the length of the radius of the circle, which is the distance from the center to any point on the circle.
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Oh, dude, the diameter of a circle that's 100 yards across is just the distance from one end to the other passing through the center, like a big ol' Pizza. So, if you were to measure from one side to the other through the middle, you'd be looking at 100 yards of circular goodness. It's like the ultimate yardstick for a giant frisbee or something.
A diameter is a line segment that joins two the edge of a circle in two places and passes through the circle's center. A diameter of one yard is equivalent to a diameter of three feet, or about a meter.
The circumference of a circle with a diameter of 18 yards is: 56.55 yards (diameter x Pi = circumference).
The area of a circle, if the diameter is 18 yards, is: 254.5 square yards.
False because it is the other way around in that if the diameter is 18 yards then the radius is 18/2 equals 9 yards.
Circumference = pi*13 yards
Circumference = (pi) x (diameter) = 10 pi = 31.416 yards (rounded)