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If the radius of a circle is 21cm What is the radius?

The radius of any circle is the straight line distance from the centre of the circle to any point on the circumference of the circle. The radius being 21 cm makes no difference to the definition of the radius; it just means that the straight line distance from the centre of that circle is 21cm away from any point on the circumference of that circle. The radius of a circle with a radius of 21 cm is 21 cm.


What is the semi circle for on the goaline in soccer for?

It is to keep other players a distance of 10 yards away when a penalty is being taken.


How can you use a compass to draw a circle if you know its raduis or diameter?

If you know the radius place the compass point on a ruler and the pencil end the radius distance away from it. Then put the point on the paper and spin to draw the circle. If you know the diameter divide by two to get the radius and place the compass point on a ruler and the pencil end the radius distance away from it. Then put the point on the paper and spin to draw the circle.


Why is the equation of a horizontal line y equals c where c is the constant?

In the Cartesian plane, a horizontal line is a constant distance away from the horizontal or x axis. If this fixed distance is c, then every point on the line is a distance c away from the x-axis. Distance from the x-axis is measured by the y coordinate so, for every point on the line, y = c.


Which physical quantity is calculated by the slope of distance time graph?

The radial velocity ie velocity towards or away from your starting point. It is NOT the ordinary speed or velocity because you can run in a circle around your starting point at top speed but the distance will not change so the slope of the distance time graph will be zero.

Related Questions

The definition of the shape circle?

A circle is a set of points equidistant ( the same distance ) away from a single point, the center of the circle.


What is radius of 2m?

A radius of 2 meters refers to the distance from the center of a circle or sphere to its outer edge. This means that if you were to draw a circle with a radius of 2 meters, every point on the circle would be exactly 2 meters away from its center. The diameter of such a circle would be 4 meters, as the diameter is twice the radius.


How big is the circle in the middle of a basketball court?

The center circle is 12 feet by 12 feet and is 38 feet away from the side line.


If the radius of a circle is 21cm What is the radius?

The radius of any circle is the straight line distance from the centre of the circle to any point on the circumference of the circle. The radius being 21 cm makes no difference to the definition of the radius; it just means that the straight line distance from the centre of that circle is 21cm away from any point on the circumference of that circle. The radius of a circle with a radius of 21 cm is 21 cm.


How many miles away from Israel is Australia?

The shortest (great circle) distance from Jerusalem to Melbourne is roughly 8,520 miles.


What is the semi circle for on the goaline in soccer for?

It is to keep other players a distance of 10 yards away when a penalty is being taken.


How can you use a compass to draw a circle if you know its raduis or diameter?

If you know the radius place the compass point on a ruler and the pencil end the radius distance away from it. Then put the point on the paper and spin to draw the circle. If you know the diameter divide by two to get the radius and place the compass point on a ruler and the pencil end the radius distance away from it. Then put the point on the paper and spin to draw the circle.


Each year Americans throw away enough plastic bottles to circle the earth how many times?

Americans throw away enough plastic bottles to circle the Earth four times every year.


How do planets revolve around the sun in the same oval or circle shape every year?

Gravity from the sun pulls the planets near it and away from it ad away foer it


Why is the equation of a horizontal line y equals c where c is the constant?

In the Cartesian plane, a horizontal line is a constant distance away from the horizontal or x axis. If this fixed distance is c, then every point on the line is a distance c away from the x-axis. Distance from the x-axis is measured by the y coordinate so, for every point on the line, y = c.


Distance from the equator to the Arctic Circle?

The Arctic tundra may be up to 5,000 miles away from the equator. This is a distance of about 8,046.72 km.


What is the distance a rabbit can hop?

if it is running away from a predator...anywhere from 3 to 5 meters