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30 Cards in this Set
- Front
- Back
polygon
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A _____________ is a plane figure formed from the three or more segments such that each segment intersects exactly two other segments, one at each endpoint, and no two segments with a common endpoint are collinear
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sides of a polygon
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The segments are called ______________________,
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vertices of a polygon
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The common endpoints are called ___________________
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equiangular polygon
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An ______________________ is one in which all angles are congruent
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equilateral polygon
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An _______________________ is one in which all sides are congruent
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regular polygon
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A _________________ is one that is both equiangular and equilateral
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reflectional symmetry
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A figure has _____________________ if and only if its reflected image across a line coincides exactly with the pre image
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axis of symmetry
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The line is called an _____________________
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rotational symmetry
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A figure has _____________________ if and only if it has at least one rotation image, not counting rotation mages of 0 degrees or multiples of 360 degrees, that coincides with the original image
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central angle
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A _____________ of a polygon is an angle whose vertex is the center of the polygon and whose sides pass through adjacent vertices
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equilateral
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three congruent sides
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isosceles
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at least two congruent sides
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scalene
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no congruent sides
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quadrilateral
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A ________________ is a polygon with four sides
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trapezoid
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A ______________ is a quadrilateral with one and only one pair of parallel sides
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parallelogram
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A _________________ is a quadrilateral with two pairs of parallel sides
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rhombus
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A __________ is a quadrilateral with four congruent sides
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rectangle
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A _____________ is a quadrilateral with four right angles
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square
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A ________ is a quadrilateral with four congruent sides and four right angles
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transversal
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A _____________ is a line that intersects two parallel lines.........do not have to be parallel
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alternate exterior angles
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Two nonadjacent exterior angles that lie on opposite sides if a transversal
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alternate interior angles
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Two nonadjacent interior angles that lie on opposite sides of the transversal
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corresponding angles
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Two nonadjacent angles, one interior and one exterior, that lie on the same side of a transversal
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same-side interior angles
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Interior angles that lie on the same side of a transversal
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exterior angle
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An angle formed between one side of polygon and the extension of an adjacent side
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remote interior angle
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An interior angle of a triangle that is not adjacent to a given exterior angle
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concave polygon
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A ___________________ is a polygon that is not convex
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convex polygon
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A ___________________ is a polygon in which any line segment connecting two points of the polygon has no part outside the polygon
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midsegment of a trapezoid
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A ___________________________ is a line connecting the midpoints of the two nonparallel segments of a trapezoid
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midsegment of a triangle
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A __________________________ is a segment whise endpoints are the midpoints of two sides
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