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With the help of Pythagoras' theorem the length of the chord works out as 9 cm or 90 mm

Q: What is the length of a chord of a circle whose midpoint is 6 cm from the circle's centre which has a diameter of 150 mm?

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It is its centre or the midpoint of its diameter.

End points of diameter: (5, 7) and (9, 3) Midpoint of diameter which is the centre of circle: (7, 5)

Its centre!

The diameter is the measurement of a line that goes right through a circle, through the centre point. In cases where we have a ring or some other such object with multiple circles, we would have an external diameter and an internal diameter. The internal diameter is the diameter of the inner circle. The external diameter is the diameter of the outer circle.

The diameter is the distance across the centre of the circle.

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It is its centre or the midpoint of its diameter.

There is such a point only if all the circles are concentric.

Diameter endpoints: (2, 7) and (-6, -1) Centre of circle will be the midpoint which is: (-2, 3)

End points of diameter: (5, 7) and (9, 3) Midpoint of diameter which is the centre of circle: (7, 5)

Its centre!

The diameter is the measurement of a line that goes right through a circle, through the centre point. In cases where we have a ring or some other such object with multiple circles, we would have an external diameter and an internal diameter. The internal diameter is the diameter of the inner circle. The external diameter is the diameter of the outer circle.

No. You can only define a circle by radius, diameter, area, perimeter. Concentric circles have the same centre, therefore, if they were the same circles with the same radius, then they would all lie on top of each other and be effectively one circle.

centre is the midpoint of the line → centre = ((-2 + 6)/2, (8 + 4)/2) = (2, 6)

The diameter is the distance across the centre of the circle.

The diameter of a circle is twice the radius.

Every diameter of the same circle is the same length, and unless someone comes alongand stretches the circle when you're not looking, the diameter doesn't change.So...YES-----------I disagree...No they are not... all circles would be the same size if that were the case.What remains a constant is that all circles are 360 degrees.==================================The question doesn't ask about " ... the diameter of circles ... ".It asks about " ... the diameter of a circle ... ".The diameter of circles is not always the same, butthe diameter of any one circle is always the same.P.S.: This is not the place to debate the answer.The "discussion area" is.

The radius is half of the diameter. The radius of a circle is the distance from the centre to the circumference. The diameter of a circle is the length of a straight line from one point on the circumference to another, passing through the centre of the circle.