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24 Cards in this Set
- Front
- Back
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An angle with a measure greater than 0 degrees and less than 90 degrees.
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acute angle
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A triangle having 3 acute angles.
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acute triangle
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two angles are complementry if the sum of their measure is 90 degrees.
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complementry angles
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polygons that have the same size and shape.
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congruent polygons
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A triangle that has three congruent sides.
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equilateral triangle
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a triangle that has at least two congruent sides.
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isoceles triangle
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an angle that measures greater than 90 degrees but less than 180 degrees.
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obtuse angle
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a triangle having one obtuse angle.
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obtuse triangle
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lines in the same plane that never intersect or cross.
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parallel lines
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a quadrilateral with both pairs of opposite sides parallel and congruent.
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paralleogram
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two lines that intersect to form right angles.
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perpendicular lines
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a polygon that has 4 sides and 4 angles.
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quadrilateral
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a parallelogram with four right angles.
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rectangle
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a paralleogram with four congruent sides.
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rhombus
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an angle that measures 90 degrees.
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right angle
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a triangle having one right side.
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right triangle
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a triangle with no congruent sides.
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scalene triangle
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a paralleogram with four congruent sides and four right angles.
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square
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an angle that measures 180 degrees.
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straight angle
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two angles are this if the sum of their measurements is 180 degrees.
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supplementry angles
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a line that intersects two or more other lines to form 8 angles.
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transversal
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a quadrilateral with exactly one pair of parallel opposite sides.
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trapezoid
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a figure formed by three line segments that intersect only at their endpoints.
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triangle
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opposite angles formed by the intersection of two lines.
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vertical angles
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