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Unit 1 Exam Geometry

Geometry

TermDefinition
Right Angle An angle that measures 90º.
Acute Angle Any angle that measures less that 90º.
Obtuse Angle Any angle that measures more than 90º.
Complementary Angles Any 2 angles that measure 90º when added up together.
Supplementary Angles Any 2 angles that measure 180º when added up together.
Vertical Angles Any set of lines that have equal sides
Linear Pair of Angles A set of angles that form 90º angles and are adjacent to each other.
Parallel Lines 2 lines that do not intersect each other.
Perpendicular Lines 2 lines that intersect and form a 90º angle.
Triangle 3 sides.
Quadrilateral 4 sides.
Pentagon 5 sides.
Hexagon 6 sides.
Septagon (Heptagon) 7 sides.
Octagon 8 sides.
Nonagon 9 sides.
Decagon 10 sides.
Unecagon 11 sides.
Dodecagon 12 sides
n-gon n sides.
Concave Polygon Lines fall outside of the shape.
Convex Polygon Lines fall inside the shape.
Polygon A closed shape with flat and connecting sides with more that 3 sides.
Diagonal A line that goes from 1 vertex to another non-consecutive vertex.
Equilateral Polygon A polygon in which all the sides are congruent.
Equiangular Polygon A polygon in which every angle is congruent.
Regular Polygon A polygon in which every angle and side is congruent.
Trapezoid A quadrilateral that has 2 parallel sides (or exactly 1 set of parallel sides).
Kite A quadrilateral in which the adjacent sides are congruent.
Parallelogram A quadrilateral that has 2 sets of parallel sides.
Rhombus A quadrilateral in which both sets of sides are parallel and congruent.
Rectangle A quadrilateral in which every angle is 90º and there are 2 sets of parallel lines that are congruent.
Square A quadrilateral in which all of the sides are congruent
Chord A line segment that extends from 1 point of the circle to another point.
Diameter It is a line segment that passes through the center and extends to the other side. (It is the longest line segment
Radius It is a line segment that extends from 1 point of the circle to the center.
Tangent It is a line that intersect a curve or circle at only 1 point.
Congruent Circles Circles that have the same radius length.
Concentric Circles Circles that share the same center.
Semi Circle It is half of a circle
Minor Arc It always measures less than 180º.
Major Arc It always measures more than 180º.
Created by: stea124
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