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Gravity
Unit 10 Circles
Terms in this set (20)
central angle of a circle
an angle whose vertex is the center of the circle
inscribed angle
an angle whose vertex is on the circle
interior angles of a circle
an angles whose vertex is inside the circle, but not the center
exterior angle
an angle whose vertex is outside the circle
central angle formula
angle=arc
inscribed angle formula
angle = arc/2
interior angle formula
exterior angle formula
intersecting chords formula
ab=cd
intersecting secants
outside (whole) = outside (whole)
intersecting secant and tangent
outside (whole) = outside (whole)
Area of a sector of a circle
(n/360)(πr²), where n is the central angle.
Arc length of a circle
(n/360)2πr, where n is the central angle
Circumference
outer edge of the circle
Radius
distance from the center to the edge of the circle; half the diameter
Diameter
distance from edge to edge of the circle, passing through the center point
Sector
the area enclosed by an arc and 2 radii
Arc
a part of the circumference
Chord
a line segment whose endpoints are on the circle
Tangent
a straight line which touches a circle at exactly 1 point
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