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### 20 Cards in this Set

• Front
• Back
 a point a location in space having no measure a line straight extending infinitely in two directions. a ray straight extending infinitely in one direction a segment straight and has a finite length a plane a flat surface extending infinitely in all directions collinear points in a straight line parallel lines lines that never intersect perpendicular lines intersect to form right angles midpoint seperates a segmen into two equal parts congruent having equal measure acute angle an angle that measures between 0 and 90 degrees right angle measures exactly 90 degrees an obtuse angle measures between 90 and 180 degrees a straight angle measures exactly 180 degrees reflex angle measures between 180 and 360 complementary angles add up to 90 degrees supplementary angles add up to 180 degrees vertical angles opposite angles formed by intersecting lines adjacent angles next to eachother and have the same vertex transversal a line that intersects two other lines at different points