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38 Cards in this Set
 Front
 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
