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ICC Math 201 Ch10
ICC Math 201 Geometry Terms
| Question | Answer |
|---|---|
| acute angle | an angle with a measure between 0 and 90 degrees |
| acute triangle | a triangle with three acute angles |
| adjacent angles | two angles that have the same vertex and a common side, but no common interior points |
| altitude of a triangle | a segment from a vertex of a triangle that is perpendicular to a line containing the opposite side of the triangle |
| angle bisector | the ray in the interior of an angle that divides the angle into two congruent angles |
| angle | the figure formed by two rays with a common endpoint |
| bisector of a segment | any point, segment, ray, or line that cuts the segment in half. |
| center of a circle | the point that is equidistant from every point on the circle |
| chord of a circle | a segment whose endpoints are on the circle |
| circle | the set of all points in a plane that are the same distance from a given point |
| closed curve | a path in a plane that begins and ends at the same point |
| collinear | points that lie on the same straight line |
| complementary angles | two angles whose measures have a sum of 90 degrees |
| concave polygon | a polygon in which one or more of the interior angles is greater than 180 degrees |
| concurrent lines | three or more lines that intersect in one point |
| congruent segments | segments that have the same length |
| coplanar | points that lie on the same plane |
| decagon | a polygon having ten sides |
| degree measure | a number which describes the size of an angle |
| diameter of a circle | a chord that goes through the center of the circle |
| dodecagon | a polygon having twelve sides |
| equiangular triangle | a triangle with three congruent angles |
| equilateral triangle | a triangle with three congruent sides |
| exterior of an angle | the set of all points not in the interior or on the angle |
| heptagon | a polygon having seven sides |
| hexagon | a polygon having six sides |
| interior angle of a polygon | an angle formed by two sides of the polygon that have the same endpoint |
| interior of an angle | the set of all points contained on and inside the two rays of an angle |
| isosceles triangle | a triangle with at least two congruent sides |
| kite | a quadrilateral having two pairs of adjacent sides that are congruent (no side is used twice in the pairs) |
| length measure | a number assigned to a segment to describe its length |
| line | a set of points in a straight, unlimited length, with no thickness or endpoints |
| linear pair of angles | two adjacent angles whose noncommon sides are on the same line |
| median of a triangle | a segment from the vertex of an interior angle to the midpoint of the opposite side |
| midpoint of a segment | the point on a segment which divides the segment in half |
| n-gon | a polygon with a whole number 'n' number of sides |
| nonagon | a polygon having nine sides |
| nonsimple closed curve | a closed curve that crosses itself at least once |
| nonsimple polygon | a polygon with at least one pair of segments that intersect at a point that is not their endpoint |
| obtuse angle | an angle with a measure between 90 and 180 degrees |
| obtuse triangle | a triangle with one obtuse angle |
| octagon | a polygon having eight sides |
| parallel lines | two or more lines that are always the same distance apart |
| parallelogram | a quadrilateral with opposite sides parallel and congruent |
| pentagon | a polygon having five sides |
| perpendicular bisector | a line perpendicular to a segment that divides the segment into two congruent segments |
| perpendicular lines | two lines which intersect to form four right angles |
| plane | a set of points in a flat surface that has no thickness and no edges |
| point of intersection | the point where two or more lines cross each other |
| point | a location that has no length, width or thickness |
| polygon | a shape formed by three or more points joined by three or more straight lines. |
| protractor | a device for measuring angles |
| quadrilateral | a polygon having four sides |
| radius of a circle | a segment whose endpoints are the center of the circle and a point on the circle |
| ray | A part of a line extending in one direction from one endpoint though another point. |
| rectangle | a quadrilateral in which opposite sides are congruent and parallel and all interior angles are right angles |
| reflex angle | an angle that is greater than 180 degrees but less than 360 degrees |
| regular polygon | a simple polygon with all sides congruent and all interior angles congruent |
| rhombus | a quadrilateral having four congruent sides and opposite sides parallel |
| right angle | an angle with a measure of 90 degrees |
| right triangle | a triangle with one right angle |
| scalene triangle | a triangle with no congruent sides |
| segment | the part of a line between two endpoints |
| sides of the triangle | the three line segments which meet each other only at their end points |
| simple closed curve | a closed curve that does not cross itself |
| simple convex polygon | a polygon where all interior angles are less than 180 degrees. |
| simple nonconvex polygon | a concave polygon |
| simple polygon | a polygon with all its segments touching only at their endpoints |
| skew lines | Nonintersecting lines that do not lie in the same plane |
| space | the set of all points that has no boundaries |
| square | a quadrilateral having four congruent sides and four right angles |
| straight angle | an angle that measures 180 degrees |
| supplementary angles | two angles whose measures have a sum of 180 degrees |
| trapezoid | a quadrilateral having only one pair of opposite sides parallel |
| triangle | a polygon having three sides |
| vertex of an angle | the common end point of the two rays that form the angle |
| vertices of a triangle | the three endpoints of the sides of the triangle |
| vertical angles | two angles that are formed by intersecting lines that are not a linear pair of angles |
| zero angle | an angle with no rotation (actually a ray) |
| icosagon | a polygon with twenty sides |
Created by:
mhohulin
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