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### 25 Cards in this Set

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 point a location in space line a straight path that is endless in both directions line segment part of a line with two endpoints ray part of a line with one endpoint and endless in one direction parallel lines lines that will never intersect perpendicular lines lines that intersect at a right angle angle two rays with a common endpoint Vertex The point where rays, sides or edges meet. right angle an angel that measures 90 degrees: it makes a perfect square corner acute angle an angle that measure more than 0 degrees and less than 90 degrees obtuse angle an angle that measures more than 90% and less than 180 degrees reflex angle an angle that measure more than 180 degrees and less than 360 degrees straight angle an angle that measures 180 degrees. It is a straight line with a vertex . in the middle polygon a closed figure mode of line segments connected endpoint to endpoint on one plane. Where each segment intersects exactly one other segment at their common endpoint. triangle a polygon with three sides quadrangle or quadrilateral a polygon with 4 sides right angle a triangle with one right angle acute angle a triangle with three acute (an angle that measures more than 0 degrees and 90 degrees) angles Scalene Triangles a triangle with no sides of the same lengths isosceles a triangle with at least two sides the same length equilateral triangle a triangle with three sides the same length Trapezoid a quadrilateral with only one pair of parallel sides parallelogram a quadrilateral with two pairs of parallel sides. rectangle a parallelogram with four right angles. rhombus parallelogram with four sides of the same length