Perpendicular - lines are lines that lines that intercept to form 90 , vertical Angles - when two lines intersect they form four angles that are across from each other , Transversal - a line that intersects two or more other lines , Parallel - lines are lines that will never intersect , interior angles - angles that are between the two lines that are intersected by the transversal., Exterior angles - angles that are NOT between two lines , Alternate interior angles  - interior angles that are the opposite sides of a transversal 3 6 , Alternate exterior angles - exterior angles that are the opposite sides of a transversal , surface area - the outside part or uppermost layer of somethin, Corresponding angles - angles that are in the same relative position , rhombus - a parallelogram with opposite equal acute angles, opposite equal obtuse angles, right triangle - a triangle with a right angle., prism - a solid geometric figure whose two end faces are similar, equal, and parallel rectilinear figures, parallelogram - a four sided plane rectilinear figure with opposite sides parallel., transversal - a system of lines., obtuse - more than 90° and less than 180, trapezoid - a quadrilateral with only one pair of parallel sides., similarity - Two shapes are Similar when one can become the other after a resize, flip, slide or turn., polygon  - a plane figure with at least three straight sides and angles, and typically five or more, circumference - the enclosing boundary of a curved geometric figure, especially a circle, equilateral - having all its sides of the same length., scalene - having sides unequal in length, isosceles triangle - having two sides of equal length.,

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