# data[].attributes.headline
standard form of the equation of a circle

# data[].attributes.subject
standard form of the equation of a circle

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(x – h)2 + (y – k)2 = r2

# data[].attributes.body
A=πr2

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C=2πr

# data[].attributes.body
an angle formed by two chords in a circle which have a common endpoint.

# data[].attributes.body
is the angle that forms when two radii meet at the center of a circle.

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The full arc of a semicircle always measures 180° (equivalently, π radians, or a half-turn).

# data[].attributes.body
is an arc of a circle having measure greater than or equal to ( radians).

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is an arc of a circle having measure less than or equal to ( radians).

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a portion of the circumference of a circle

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A "pie-slice" part of a circle - the area between two radiuses and the connecting arc of a circle.

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A line passing through two points on a circle

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is a straight line segment whose endpoints both lie on the circle.

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line to a circle is a line that touches the circle at exactly one point, never entering the circle's interior

# data[].attributes.body
a straight line from the center to the circumference of a circle or sphere.

# data[].attributes.body
a straight line passing from side to side through the center of a body or figure

# data[].attributes.body
a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center)