click below
click below
Normal Size Small Size show me how
Unit 11
Geometric Constructions
Term | Definition |
---|---|
angle | A figure formed by two line segments or rays with a common endpoint. |
vertex | A common endpoint of two or more line segments or rays. |
right angle | An angle that measures exactly 90 degrees. |
acute angle | An angle that measures greater than zero degrees and less than 90 degrees. |
obtuse angle | An angle that measures greater than 90 degrees but less than 180 degrees. |
straight angle | An angle that measures exactly 180 degrees. |
degree | The measurement of an angle. |
complementary angles | Two angles whose measures have the sum of 90° |
supplementary angles | Two angles whose measures have the sum of 180°. |
adjacent angles | Angles that have a common vertex and a common side, but no common interior points. |
parallel lines | Lines in the same plane that never intersect and remain the same distance apart from each other. |
intersecting lines | Lines that have one or more points in common. |
perpendicular lines | Two lines that meet at a point and form right angles (90°) to each other. |
vertical angles | The opposite angles formed by two intersecting lines. Vertical angles have the same measure and therefore are congruent. |
plane | A flat, two-dimensional surface. |
transversal | A line that intersects two or more lines. |
triangle | A polygon with three sides and three angles. |
triangulating | Dividing a polygon into triangles without introducing any new vertices. |
construct | To form by assembling or combining parts; build. |
side length | The measure of a line segment forming part of the perimeter of a plane geometric figure. |
protractor | An instrument used to measure angles. |