It is the line from any point on a circle to the center
The name for a picture that looks like it's moving is called an optical illusion or a motion illusion.
Yes, glass can be cut with a radius by using a special glass cutter or a wet saw with a diamond blade. It is important to use proper safety precautions and techniques to avoid chipping or cracking the glass.
The analogy for d-B to r is like comparing the distance between two points on a straight line (d-B) to the radius of a circle (r). Just as the radius measures the distance from the center of a circle to any point on its circumference, d-B represents the shortest distance between two points on a line.
A nucleus with a radius half that of uranium-236 would have 92 protons like uranium but fewer neutrons, resulting in a lower atomic mass. An example would be the nucleus of xenon-142, which has a smaller radius than uranium-236 due to having fewer nucleons.
Centripetal force is not a force like gravity, which is there for any object with mass in a gravitational field (such as that of the earth, the sun), but a force which must be present in order to move in a circle. There is never a situation where you say "aha, this generates a centripetal force", but if something is moving in a circle (and certain types of ellipse) you can say that one of the forces already present (such as gravity, or tension for a weight on a string) is providing the required centripetal acceleration for circular motion. In practice though, the cheap and dirty trick is just to say the centripetal force is equal to (mass of the moving object x velocity^2) / (the radius of the circle).
it looks like a circle.
A circle
Looks to us like it's another circle, concentric with the first one, with radius of sqrt(5) = 2.236 . (rounded)
it looks like a circle
The apothem is the perpendicular from the cent of a regular polygon to one of it's sides. When drawn it looks like the line drawn for the radius or circumference of a circle.
Well, since the formula for the area of a circle is Pi (3.14) times the radius squared, you can use substitution to get an equation that looks like this: 3.14(102) ...which can be simplified to 3.14(100), which can be simplified to come up with the answer of 314 square units.
12 x 12 sounds like a square, not like a circle. To specify a circle, you need a single number, for example the radius or the diameter. Assuming the diameter is 12, the radius would be half of that (6 units). The "size" of the circle can be considered this radius (6), the diameter (12), or the area calculated by the formula pi * radius * radius.
area of a circle is pi times the radius squared. If you simplify pi to 3.14, then the area is about 18.0864 square meters. For a more accurate calculation, use a calculator that has a pi button, and multiply it by 5.76.For reference sake, pi looks somewhat like this:__| |
Oh, dude, this is like basic math 101. The diameter of a circle is just twice the radius, so if the radius is 1 meter, the diameter is 2 meters. It's like the circle's way of saying, "I'm just twice as big as my radius, no big deal."
Just like any other circle, the area of that one is (pi) times (the square of the radius).
A circle with a radius equal to the base of the cone. This circle will be tangential to a segment of a circle whose arc is the same length as the circle, and whose radius is the slant height of the cone.
The radius of a circle is from the middle to the edge, or half the diameter. The circumference is like the perimeter of the circle, and the formula is pi times the diameter.