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30 Cards in this Set

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  • Back
Acute angle
an angle measuring between zero and 90 degrees
Acute triangle
a triangle with three acute angles
Atlernate exterior angles
congruent angles formed by two parallel lines cut by a transversal; located on opposite sides of the transversal outside the parallel lines
Alternate interior angles
congruent angles formed by two parallel lines cut by a transversal; located on opposite sides of the transversal between the parallel lines
Altitude
the height of a 2-D or 3-D geometric figure measured perpendicularly from the center of the top face or point to the center of the base
Base
the top and bottom parallel polygonal faces
Center
the point in the middle of the circle or sphere
Circle
a 2-D figure; the set of all points at a given distance from the center
Circular
a cone or cylinder with circles for base(s)
Circumference
the perimeter of a circle
Closed curve
a curve that can be traced without lifting the pencil, has the same starting/stopping points and may cross itself (creates an inside and outside of the curve)
Complementary angles
two or more angles that sum to 90 degrees
Concave
a line segment connecting two points of the interior can go outside the polygon; at least one of the interior angles is greater than 180 degrees
Cone
a 3-D figure with a circular or non-circular base and rounding sides rising to a point
Congruent
of the same size and shape
Convex polygon
a line segment connecting any two points of the interior does not go outside the polygon; none of the interior angles is greater than 180 degrees
Corresponding angles
congruent angles formed by two parallel lines cut by a transversal; positioned on matching "corners" of intersections
Cylinder
a 3-D figure with circular or non-circular parallel congruent bases and curving sides
Diagonal
a line segment connecting two non-adjacent vertices of a polygon
Equiangular triangle
a triangle with three congruent angles
Equilateral triangle
a triangle with three congruent sides
Isosceles trapezoid
a trapezoid with two congruent legs
Isosceles triangle
a triangle with two congruent legs
Kite
a quadrilateral with two pair of adjacent congruent sides
Lateral faces
the polygon shapes making up the sides of a polyhedron
Non-circular
a cone or cylinder with base(s) that are not circles but ovals or other curvy shapes
Oblique
a 3-D geometric figure with an altitude not perpendicular to the base
Obtuse angle
an angle measuring between 90 and 180 degrees
Obtuse triangle
a triangle with one obtuse angle
Parallel lines
lines that never intersect in a plane