An angle whose measure is exactly 180 degrees

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Two lines that intersect to form a right angle.

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A trianglewith 1 right angle which is 90 degrees.

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Two lines in the same plane that do not intersect.

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Two angles whose measures have the sum of 180 degrees.

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An angle whose measure is less than 90 degrees.

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Two angles whose measures have the sum of 90 degrees.

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An angle whose measure is more than 90 but less than 180 degrees.

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A pair of opposite angles formed when to lines meet at a point.

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A triangle with 3 acute angles.

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A triangle with 1 right angle.

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A closed geometric figure made up of four sides.

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A triangle with 1 obtuse angle.

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A quadrilateral with exactly 1 pair of parallel lines.

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A triangle with 3 equal sides.

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A triangle with at least 2 congruent sides.

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A parallelogram with four congruent sides.

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A triangle with 0 congruent sides.

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A polygon with 5 sides.

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A polygon with 6 sides.

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 A quadrilateral with both paires of opposite siddes parallel.

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A closed geometric figure that consist of 3 or more sides.

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A polygon with all sides equal in length.

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SEgments with the exact same length.

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Angles that have the same measure.

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Pairs of side and angles of polygons that are in the same position.

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A transformation that creates a mirror image of each point of a figure

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A polygon with 7 sides.

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A polygon with 8 sides.

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An operation that changes a figure into another figure.

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