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Geometry Unit 4 Vocabulary
23 cards·by thend80
Arc
an unbroken part of a circle; minor arcs have a measure less than 180 degrees
Arc
an unbroken part of a circle; minor arcs have a measure less than 180 degrees
arc
an unbroken part of a circle; minor arcs have a measure less than 180 degrees ; semicircles are
arcs that measure exactly 180 degrees ; majo
arc length
a portion of the circumference of the circle
arc measure
The angle that an arc makes at the center of the circle of which it is a part.
Cavalieri's Principle
A method, with formula given below, of finding the volume of any solid for which
cross-sections by parallel planes have equal areas. This in
central angle
an angle whose vertex is at the center of a circle
chord
a segment whose endpoints are on a circle
circumcenter
The point of intersection of the perpendicular bisectors of the sides of a given triangle; the
center of the circle circumscribed about a gi
Circumscribed Circle
a circle containing an inscribed polygon; for this unit the polygon will be a triangle and so
the center of the circle will be the circumcen
composite figures
If a figure is made from two or more geometric figures, then it is called a Composite Figure.
inscribed
an inscribed planar shape or solid is one that is enclosed by and "fits snugly" inside another
geometric shape or solid
inscribed angle
an angle whose vertex is on the circle and whose sides contain chords of a circle
inscribed circle
a circle enclosed in a polygon, where every side of the polygon is a tangent to the circle;
specifically for this unit the polygon will be a
inscribed polygon
a polygon whose vertices all lie on a circle
lateral area
The sum of the areas of the lateral (vertical) faces of a cylinder, cone, frustum or the like.
major and minor arcs
Given two points on a circle, the minor arc is the shortest arc linking them. The major arc is the
longest.
point of tangency
the point where a tangent line touches a circle.
secant line
a line in the plane of a circle that intersects a circle at exactly two points
secant segment
a segment that contains a chord of a circle and has exactly one endpoint outside of the circle
sector
the region bounded by two radii of the circle and their intercepted arc
slant height
The diagonal distance from the apex of a right circular cone or a right regular pyramid to the
base.
tangent line
a line in the plane of a circle that intersects a circle at only one point, the point of tangency