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30 Cards in this Set
- Front
- Back
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Acute angle
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an angle measuring between zero and 90 degrees
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Acute triangle
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a triangle with three acute angles
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Atlernate exterior angles
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congruent angles formed by two parallel lines cut by a transversal; located on opposite sides of the transversal outside the parallel lines
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Alternate interior angles
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congruent angles formed by two parallel lines cut by a transversal; located on opposite sides of the transversal between the parallel lines
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Altitude
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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
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Base
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the top and bottom parallel polygonal faces
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Center
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the point in the middle of the circle or sphere
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Circle
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a 2-D figure; the set of all points at a given distance from the center
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Circular
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a cone or cylinder with circles for base(s)
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Circumference
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the perimeter of a circle
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Closed curve
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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)
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Complementary angles
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two or more angles that sum to 90 degrees
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Concave
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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
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Cone
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a 3-D figure with a circular or non-circular base and rounding sides rising to a point
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Congruent
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of the same size and shape
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Convex polygon
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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
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Corresponding angles
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congruent angles formed by two parallel lines cut by a transversal; positioned on matching "corners" of intersections
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Cylinder
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a 3-D figure with circular or non-circular parallel congruent bases and curving sides
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Diagonal
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a line segment connecting two non-adjacent vertices of a polygon
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Equiangular triangle
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a triangle with three congruent angles
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Equilateral triangle
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a triangle with three congruent sides
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Isosceles trapezoid
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a trapezoid with two congruent legs
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Isosceles triangle
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a triangle with two congruent legs
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Kite
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a quadrilateral with two pair of adjacent congruent sides
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Lateral faces
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the polygon shapes making up the sides of a polyhedron
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Non-circular
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a cone or cylinder with base(s) that are not circles but ovals or other curvy shapes
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Oblique
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a 3-D geometric figure with an altitude not perpendicular to the base
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Obtuse angle
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an angle measuring between 90 and 180 degrees
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Obtuse triangle
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a triangle with one obtuse angle
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Parallel lines
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lines that never intersect in a plane
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