Circle Vocabulary Flashcards

1
Q

Circle

A

All points in a plane that are a given distance from a given point

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2
Q

Diameter

A

The chord that intersects the center of the circle

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3
Q

Radius

A

1/2 the diameter. Measure from the center to the curve.

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4
Q

Tangent

A

A line that intersects a circle at only one point

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5
Q

Secant

A

A line that intersects a circle at two points

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6
Q

Chord

A

A line segment with endpoints on the circle

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7
Q

Circumference

A

The distance around the circle. The perimeter of the circle.

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8
Q

Inscribed circle

A

A circle is inscribed in a polygon if it is tangent to the sides of the polygon

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9
Q

Inscribed polygon

A

A polygon is inscribed in a circle if it’s vertices are tangent to the circle.

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10
Q

Circumscribed circle

A

A circle that passes through the vertices of a polygon. The polygon is inscribed in the circle.

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11
Q

Arc

A

A portion of the circle’s circumference

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12
Q

Sector

A

A portion of the circle’s area.

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13
Q

Central Angle

A

An angle whose vertex is at the center of the circle

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14
Q

Inscribed angle

A

An angle whose vertex is on the circle.

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15
Q

Intercepted arc

A

An arc whose endpoints are on the sides of an inscribed angle.

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