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38 Cards in this Set

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  • Back
area
the number of square units in a polygonal region needed to cover its surface
central angle
an angle whose vertex is the center of the circle
chord
a segment whose endpoints are points on the circle
circle
the set of all points in a plane that are equidistant from a given point
circumference
the distance around a circle
concentric circles
circles that have a common center
cone
a solid with a circular base and a vertex that is not in the same plane as the base
cosine
a trigonometric ratio. adj/hyp
cylinder
a solid with congruent circular bases that lie in parallel planes
diameter
a chord that passes through the center of the line
geometric mean
for two positive numbers a and b the positive number x that a/x=x/b
inscribed angle
an angle whose vertex is on the circle and whose sides contain chords of the circle
inscribed polygon
a polygon whose vertices all lie on the circle
kite
a quadrilateral that has two pairs of consecutive congruent sides, but in which opposite sides are not congruent
major arc
the part of a circle that measures between 180* and 360*
minor arc
the part of a circle that measures less than 180*`
parallelogram
a quadrilateral with both pairs of opposite sides parallel
polygon
a plane figure that meets the following two conditions
1.it is formed by three or more segments called sides, such that no two sides with a common endpoint are colinear
2.each side intersects exactly tow other sides,one at each endpoint
polyhedron
a side that is bounded by polygons, called faces that enclose a single region of space
prism
a polyhedron with two congruent faces called bases that lie in parallel planes
proportion
an equation that equates two ratios
pyramid
a polyhedron in which the base is a polygon and the lateral faces are triangles with a common vertex
radius
the distance from the center of a circle to a point on the circle
ratio
the quotient a/b if a and b are two quantities that are measured in the same units
rectangle
a parallelogram with four right angles
regular polygon
a polygon that is equilateral and equilangular
rhombus
a parallelogram with four congruent sides
right cylinder
a cylinder such that the segment joining the centers of the bases are perpendicular to the bases
secant
a line that intersects the circle at two points
sector of a circle
the region bounded by two radii of a circle and their intercepted arc
semicircle
an arc whose endpoints of a diameter of the circle
sine
a trigonometric ratio. opp/hyp
sphere
the locus of points in a space that are a given distance from a point
square
a parallelogram with four congruent sides and four right angles
tangent
a trigonometric ratio. opp/adj
tangent line
a line that intersects a circle in exactly one point
trapezoid
a quadrilateral with exactly one pair of parallel sides
vector
a quantity that has both direction and magnitude